/* packet-megaco.c
* Routines for megaco packet disassembly
* RFC 3015
*
* $Id: packet-megaco.c 28356 2009-05-13 19:46:11Z etxrab $
*
* Christian Falckenberg, 2002/10/17
* Copyright (c) 2002 by Christian Falckenberg
*                       <christian.falckenberg@nortelnetworks.com>
*
* Christoph Wiest,		2003/06/28
* Modified 2003 by		Christoph Wiest
*						<ch.wiest@tesionmail.de>
* Modifyed 2004 by		Anders Broman
*						<anders.broman@ericsson.com>
* To handle TPKT headers if over TCP
* Modified 2005 by		Karl Knoebl
*						<karl.knoebl@siemens.com>
*	provide info to COL_INFO and some "prettification"
*
* Copyright (c) 2006 Anders Broman <anders.broman@ericsson.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/


#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
#include <string.h>

#include <glib.h>
#include <epan/packet.h>
#include <epan/emem.h>
#include <epan/addr_resolv.h>
#include <epan/prefs.h>
#include <epan/strutil.h>
#include <epan/sctpppids.h>
#include <epan/dissectors/packet-tpkt.h>
#include <epan/asn1.h>
#include <epan/dissectors/packet-per.h>
#include <epan/dissectors/packet-h245.h>
#include <epan/dissectors/packet-ip.h>
#include <epan/dissectors/packet-ber.h>

#include <epan/gcp.h>
#include <epan/tap.h>

#define PORT_MEGACO_TXT 2944
#define PORT_MEGACO_BIN 2945

/* Define the megaco proto */
static int proto_megaco			= -1;

/* Define headers for megaco */
static int hf_megaco_version    	= -1;
static int hf_megaco_transaction   	= -1;
static int hf_megaco_transid    	= -1;
static int hf_megaco_Context		= -1;
static int hf_megaco_command_line	= -1;
static int hf_megaco_command		= -1;
static int hf_megaco_termid			= -1;



/* Define headers in subtree for megaco */
static int hf_megaco_modem_descriptor           = -1;
static int hf_megaco_multiplex_descriptor       = -1;
static int hf_megaco_media_descriptor			= -1;
static int hf_megaco_events_descriptor          = -1;
static int hf_megaco_signal_descriptor          = -1;
static int hf_megaco_audit_descriptor           = -1;
static int hf_megaco_servicechange_descriptor	= -1;
static int hf_megaco_digitmap_descriptor		= -1;
static int hf_megaco_statistics_descriptor		= -1;
static int hf_megaco_observedevents_descriptor	= -1;
static int hf_megaco_topology_descriptor		= -1;
static int hf_megaco_error_descriptor			= -1;
static int hf_megaco_TerminationState_descriptor= -1;
static int hf_megaco_Remote_descriptor 			= -1;
static int hf_megaco_Local_descriptor 			= -1;
static int hf_megaco_LocalControl_descriptor 	= -1;
static int hf_megaco_packages_descriptor		= -1;
static int hf_megaco_error_Frame				= -1;
static int hf_megaco_Service_State				= -1;
static int hf_megaco_Event_Buffer_Control		= -1;
static int hf_megaco_mode						= -1;
static int hf_megaco_reserve_group				= -1;
static int hf_megaco_h324_muxtbl_in				= -1;
static int hf_megaco_h324_muxtbl_out			= -1;
static int hf_megaco_ds_dscp					= -1;
static int hf_megaco_h324_h223capr				= -1;
static int hf_megaco_reserve_value				= -1;
static int hf_megaco_streamid 					= -1;
static int hf_megaco_requestid 					= -1;
static int hf_megaco_pkgdname					= -1;
static int hf_megaco_mId						= -1;
static int hf_megaco_h245						= -1;
static int hf_megaco_h223Capability				= -1;
static int hf_megaco_audititem				= -1;

/* Define the trees for megaco */
static int ett_megaco 							= -1;
static int ett_megaco_message					= -1;
static int ett_megaco_message_body				= -1;
static int ett_megaco_context					= -1;
static int ett_megaco_command_line 				= -1;
static int ett_megaco_mediadescriptor			= -1;
static int ett_megaco_descriptors 				= -1;
static int ett_megaco_TerminationState			= -1;
static int ett_megaco_Localdescriptor			= -1;
static int ett_megaco_Remotedescriptor			= -1;
static int ett_megaco_LocalControldescriptor	= -1;
static int ett_megaco_auditdescriptor			= -1;
static int ett_megaco_eventsdescriptor			= -1;
static int ett_megaco_observedeventsdescriptor	= -1;
static int ett_megaco_observedevent				= -1;
static int ett_megaco_packagesdescriptor		= -1;
static int ett_megaco_requestedevent			= -1;
static int ett_megaco_signalsdescriptor			= -1;
static int ett_megaco_requestedsignal			= -1;
static int ett_megaco_h245 						= -1;

static gcp_hf_ett_t megaco_ctx_ids = {{-1,-1,-1,-1,-1,-1},{-1,-1,-1,-1}};

static dissector_handle_t megaco_text_handle;

static int megaco_tap = -1;

/*
* Here are the global variables associated with
* the various user definable characteristics of the dissection
*
* MEGACO has two kinds of message formats: text and binary
*
* global_megaco_raw_text determines whether we are going to display
* the raw text of the megaco message, much like the HTTP dissector does.
*
* global_megaco_dissect_tree determines whether we are going to display
* a detailed tree that expresses a somewhat more semantically meaningful
* decode.
*/
static guint global_megaco_txt_tcp_port = PORT_MEGACO_TXT;
static guint global_megaco_txt_udp_port = PORT_MEGACO_TXT;
#if 0
static guint global_megaco_bin_tcp_port = PORT_MEGACO_BIN;
static guint global_megaco_bin_udp_port = PORT_MEGACO_BIN;
#endif
static gboolean global_megaco_raw_text = TRUE;
static gboolean global_megaco_dissect_tree = TRUE;

/* Some basic utility functions that are specific to this dissector */
static gint megaco_tvb_skip_wsp(tvbuff_t* tvb, gint offset);
static gint megaco_tvb_skip_wsp_return(tvbuff_t* tvb, gint offset);
/*
* The various functions that either dissect some
* subpart of MEGACO.  These aren't really proto dissectors but they
* are written in the same style.
*
*/
static void
dissect_megaco_descriptors(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, gint tvb_descriptors_start_offset, gint tvb_descriptors_end_offset);
static void
dissect_megaco_modemdescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_multiplexdescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_mediadescriptor(tvbuff_t *tvb, proto_tree *tree,packet_info *pinfo, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_eventsdescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_signaldescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_auditdescriptor(tvbuff_t *tvb, proto_tree *tree,packet_info *pinfo, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_servicechangedescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_digitmapdescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_statisticsdescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_observedeventsdescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_topologydescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_errordescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_RBRKT, gint tvb_previous_offset);
static void
dissect_megaco_TerminationStatedescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_next_offset, gint tvb_current_offset);
static void
dissect_megaco_Localdescriptor(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, gint tvb_next_offset, gint tvb_current_offset);
static void
dissect_megaco_LocalControldescriptor(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, gint tvb_next_offset, gint tvb_current_offset);
static void
dissect_megaco_Packagesdescriptor(tvbuff_t *tvb, proto_tree *tree, gint tvb_next_offset, gint tvb_current_offset);
static void
tvb_raw_text_add(tvbuff_t *tvb, proto_tree *tree);
static void
dissect_megaco_text(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);

static dissector_handle_t data_handle;
static dissector_handle_t sdp_handle;
static dissector_handle_t h245_handle;
static dissector_handle_t h248_handle;
static dissector_handle_t h248_otp_handle;

static gboolean keep_persistent_data = FALSE;

static proto_tree *top_tree;
/*
 * dissect_megaco_text over TCP, there will be a TPKT header there
 *
 */
static void dissect_megaco_text_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	int lv_tpkt_len;

	/* This code is copied from the Q.931 dissector, some parts skipped.
	 * Check whether this looks like a TPKT-encapsulated
	 * MEGACO packet.
	 *
	 * The minimum length of a MEGACO message is 6?:
	 * Re-assembly ?
	 */
	lv_tpkt_len = is_tpkt(tvb, 6);
	if (lv_tpkt_len == -1) {
		/*
		 * It's not a TPKT packet;
		 * Is in MEGACO ?
		 */
		dissect_megaco_text(tvb, pinfo, tree);
	}
	dissect_tpkt_encap(tvb, pinfo, tree, TRUE,
	    megaco_text_handle);
}

#define ERRORTOKEN			1
#define	TRANSTOKEN			2
#define	REPLYTOKEN			3
#define	PENDINGTOKEN		4
#define	RESPONSEACKTOKEN	5

typedef struct {
        const char *name;
        const char *compact_name;
} megaco_tokens_t;

static const megaco_tokens_t megaco_messageBody_names[] = {
		{ "Unknown-token",	 			NULL }, /* 0 Pad so that the real headers start at index 1 */
		{ "Error",						"ER" }, /* 1 */
		{ "Transaction",				"T" },	/* 2 */
		{ "Reply",						"P" },	/* 3 */
		{ "Pending",					"PN" }, /* 4 */
		{ "TransactionResponseAck",		"K" },	/* 5 */
};

/* Returns index of megaco_tokens_t */
static gint find_megaco_messageBody_names(tvbuff_t *tvb, int offset, guint header_len)
{
	guint i;

	for (i = 1; i < array_length(megaco_messageBody_names); i++) {
		if (header_len == strlen(megaco_messageBody_names[i].name) &&
		    tvb_strncaseeql(tvb, offset, megaco_messageBody_names[i].name, header_len) == 0)
			return i;
		if (megaco_messageBody_names[i].compact_name != NULL &&
		    header_len == strlen(megaco_messageBody_names[i].compact_name) &&
		    tvb_strncaseeql(tvb, offset, megaco_messageBody_names[i].compact_name, header_len) == 0)
			return i;
	}

	return -1;
}

static proto_item *
my_proto_tree_add_string(proto_tree *tree, int hfindex, tvbuff_t *tvb,
			 gint start, gint length, const char *value)
{
	proto_item *pi;

	pi = proto_tree_add_string(tree, hfindex, tvb, start, length, value);
	if (!global_megaco_dissect_tree) {
		PROTO_ITEM_SET_HIDDEN(pi);
	}

	return(pi);
}
/*
 * dissect_megaco_text - The dissector for the MEGACO Protocol, using
 * text encoding.
 */
static void
dissect_megaco_text(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	gint		tvb_len, len;
	gint		tvb_offset,tvb_current_offset,tvb_previous_offset,tvb_next_offset,tokenlen;
	gint		line_start_offset, ver_offset, ver_length, mId_offset, mId_length;
	gint		tvb_command_start_offset, tvb_command_end_offset;
	gint		tvb_descriptors_start_offset, tvb_descriptors_end_offset;
	proto_tree  *megaco_tree, *message_tree, *message_body_tree, *megaco_context_tree, *megaco_tree_command_line, *ti, *sub_ti;

	guint8		word[7];
	guint8		TermID[30];
	guint8		tempchar;
	gint		tvb_RBRKT, tvb_LBRKT,  RBRKT_counter, LBRKT_counter;
	guint		token_index=0;
	guint32		dword;

	gcp_msg_t* msg = NULL;
	gcp_trx_t* trx = NULL;
	gcp_ctx_t* ctx = NULL;
	gcp_cmd_t* cmd = NULL;
	gcp_term_t* term = NULL;
	gcp_trx_type_t trx_type = GCP_TRX_NONE;
	guint32 trx_id = 0;
	guint32 ctx_id = 0;
	gcp_cmd_type_t cmd_type = GCP_CMD_NONE;
	gcp_wildcard_t wild_term = GCP_WILDCARD_NONE;
	proto_item *hidden_item;

	top_tree=tree;
	/* Initialize variables */
	tvb_len						= tvb_length(tvb);
	megaco_tree					= NULL;
	ti							= NULL;
	tvb_previous_offset			= 0;
	tvb_current_offset			= 0;
	tvb_offset					= 0;
	tvb_next_offset				= 0;
	tvb_command_start_offset	= 0;
	tvb_command_end_offset		= 0;
	tvb_RBRKT					= 0;
	tvb_LBRKT					= 0;
	RBRKT_counter				= 0;
	LBRKT_counter				= 0;

	/* Check if H.248 in otp(Erlang) internal format
	 * XXX Needs improvment?
	 * Ref:
	 * http://www.erlang.org/doc/apps/megaco/part_frame.html
	 * 4.1 Internal form of messages
	 * 4.2 The different encodings
	 */
	dword = tvb_get_ntoh24(tvb,0);
	if ((dword == 0x836803)&&(h248_otp_handle)){
		call_dissector(h248_otp_handle, tvb, pinfo, tree);
		return;
	}

	msg = gcp_msg(pinfo, TVB_RAW_OFFSET(tvb), keep_persistent_data);

	/*
	 * Check to see whether we're really dealing with MEGACO by looking
	 * for the "MEGACO" string or a "!".This needs to be improved when supporting
	 * binary encodings. Bugfix add skipping of leading spaces.
	 */
	tvb_offset = megaco_tvb_skip_wsp(tvb, tvb_offset);
	line_start_offset = tvb_offset;
	/* Quick fix for MEGACO not following the RFC, hopfully not breaking any thing
	 * Turned out to be TPKT in case of TCP, added some code to handle that.
	 *
	 * tvb_offset = tvb_find_guint8(tvb, tvb_offset, 5, 'M');
	 */
	if(!tvb_get_nstringz0(tvb,tvb_offset,sizeof(word),word)) return;




	if (g_ascii_strncasecmp(word, "MEGACO", 6) != 0 && tvb_get_guint8(tvb, tvb_offset ) != '!'){
		gint8 class;
		gboolean pc;
		gint32 tag;
		dissector_handle_t handle = data_handle;

		get_ber_identifier(tvb, 0, &class, &pc, &tag);

		if (class == BER_CLASS_UNI && pc && tag == BER_UNI_TAG_SEQUENCE ) {
			handle = h248_handle;
		}

		call_dissector(handle,tvb,pinfo,tree);

		return;
	}


	/* Display MEGACO in protocol column */
	if (check_col(pinfo->cinfo, COL_PROTOCOL))
		col_set_str(pinfo->cinfo, COL_PROTOCOL, "MEGACO");

	/* Build the info tree if we've been given a root */
	/* Create megaco subtree */
	ti = proto_tree_add_item(tree,proto_megaco,tvb, 0, -1, FALSE);
	megaco_tree = proto_item_add_subtree(ti, ett_megaco);

 	/*  Format of 'message' is = MegacopToken SLASH Version SEP mId SEP messageBody */
	/*  MegacopToken = "MEGACO" or "!"						*/
  	/*  According to H248.1-200205 Annex B Text encoding ( protocol version 2 )     */

	/* Find version */
	tvb_previous_offset = tvb_find_guint8(tvb, 0,
		tvb_len, '/');
	if (tvb_previous_offset == -1) {
		proto_tree_add_text(megaco_tree, tvb, 0, -1,
		    "Sorry, no \"/\" in the MEGACO header, I can't parse this packet");
		return;
	}
	tvb_previous_offset = tvb_previous_offset + 1;
	/* As version should follow /, just add 1, works till ver 9 */
	tvb_current_offset  = tvb_previous_offset + 1;


	tokenlen = tvb_current_offset - tvb_previous_offset;
	ver_offset = tvb_previous_offset;
	ver_length = tokenlen;

	/* Pos of version + 2 should take us past version + SEP					*/

	tvb_previous_offset = tvb_previous_offset + 2;
	/* in case of CRLF				*/
	if (tvb_get_guint8(tvb, tvb_current_offset ) == '\n')
		tvb_previous_offset++;
	if (tvb_get_guint8(tvb, tvb_current_offset ) == '\r')
		tvb_previous_offset++;

	/* mId should follow here,
	 * mId = (( domainAddress / domainName ) [":" portNumber]) / mtpAddress / deviceName
	 * domainAddress = "[" (IPv4address / IPv6address) "]"
	 * domainName = "<" (ALPHA / DIGIT) *63(ALPHA / DIGIT / "-" /".") ">"
	 * mtpAddress = MTPToken LBRKT 4*8 (HEXDIG) RBRKT
	 * MTPToken = ("MTP")
	 * deviceName = pathNAME
	 * pathNAME = ["*"] NAME *("/" / "*"/ ALPHA / DIGIT /"_" / "$" )["@" pathDomainName ]
	 */

	tokenlen = tvb_find_line_end( tvb, tvb_previous_offset, -1, &tvb_next_offset, FALSE);
	/* accept white spaces as SEParator too */
	if ( (tvb_current_offset=tvb_find_guint8(tvb, tvb_previous_offset, tokenlen, ' ')) != -1 ) {
		/* SEP after mID might be spaces only */
		tokenlen = tvb_current_offset-tvb_previous_offset;
		tvb_next_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset);
	}

   /* Att this point we should point to the "\n" ending the mId element
    * or to the next character after white space SEP
	*/
	mId_offset = tvb_previous_offset;
	mId_length = tokenlen;

	/* Add the first line to the tree */
	tokenlen = tvb_next_offset - line_start_offset;
	ti = proto_tree_add_text(megaco_tree, tvb, line_start_offset, tokenlen,
			"%s",tvb_format_text(tvb,line_start_offset,tokenlen));
	message_tree = proto_item_add_subtree(ti, ett_megaco_message);
	if (tree){
		if(global_megaco_dissect_tree){
			proto_tree_add_item(message_tree, hf_megaco_version,tvb, ver_offset, ver_length, FALSE);
			proto_tree_add_item(message_tree, hf_megaco_mId,tvb, mId_offset, mId_length, FALSE);
		}else{
			hidden_item = proto_tree_add_item(message_tree, hf_megaco_version,tvb, ver_offset, ver_length, FALSE);
			PROTO_ITEM_SET_HIDDEN(hidden_item);
			hidden_item = proto_tree_add_item(message_tree, hf_megaco_mId,tvb, mId_offset, mId_length, FALSE);
			PROTO_ITEM_SET_HIDDEN(hidden_item);
		}
	}

	tvb_previous_offset = tvb_next_offset;

/* Next part is
 *	: messageBody = ( errorDescriptor / transactionList )
 * 		errorDescriptor = ErrorToken EQUAL ErrorCode LBRKT [quotedString] RBRKT
 * 			ErrorToken = ("Error" / "ER")
 *
 *		transactionList = 1*( transactionRequest / transactionReply /
 *					transactionPending / transactionResponseAck )
 *
 *		transactionResponseAck = ResponseAckToken LBRKT
 *			transactionAck*(COMMA transactionAck) RBRKT
 *				ResponseAckToken = ("TransactionResponseAck"/ "K")
 *
 *		transactionPending = PendingToken EQUAL TransactionID LBRKT RBRKT
 *			PendingToken = ("Pending" / "PN")
 *
 *		transactionReply = ReplyToken EQUAL TransactionID LBRKT
 *			[ ImmAckRequiredToken COMMA]( errorDescriptor / actionReplyList ) RBRKT
 *			ReplyToken = ("Reply" / "P")
 *
 *		transactionRequest = TransToken EQUAL TransactionID LBRKT
 *			actionRequest *(COMMA actionRequest) RBRKT
 *			TransToken = ("Transaction" / "T")
 */
	tempchar = tvb_get_guint8(tvb, tvb_previous_offset);
	if ( (tempchar >= 'a')&& (tempchar <= 'z'))
		tempchar = tempchar - 0x20;

	/* Find token length */
	for (tvb_offset=tvb_previous_offset; tvb_offset < tvb_len-1; tvb_offset++){
		if (!isalpha(tvb_get_guint8(tvb, tvb_offset ))){
			break;
		}
	}
	tokenlen = tvb_offset - tvb_previous_offset;
	token_index = find_megaco_messageBody_names(tvb, tvb_previous_offset, tokenlen);
	/* Debug code
		g_warning("token_index %u",token_index);
	*/

	switch ( token_index ){
		/* errorDescriptor */
		case ERRORTOKEN:
			if (check_col(pinfo->cinfo, COL_INFO) )
			col_set_str(pinfo->cinfo, COL_INFO, "Error  ");

			tvb_current_offset = tvb_find_guint8(tvb, tvb_offset+1, tvb_len, '}');

			ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset,
					"%s",tvb_format_text(tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset+1));
			message_body_tree = proto_item_add_subtree(ti, ett_megaco_message_body);

			if (tree) {
				my_proto_tree_add_string(message_body_tree, hf_megaco_transaction, tvb,
				tvb_previous_offset, tokenlen,
				"Error" );

				tvb_command_start_offset = tvb_previous_offset;
				dissect_megaco_errordescriptor(tvb, megaco_tree, tvb_len-1, tvb_command_start_offset);
			}
			return;
			/* transactionResponseAck
			 * transactionResponseAck = ResponseAckToken LBRKT transactionAck
			 *                           *(COMMA transactionAck) RBRKT
			 * transactionAck = transactionID / (transactionID "-" transactionID)
			 */
		case RESPONSEACKTOKEN:
			trx_type = GCP_TRX_ACK;
			tvb_LBRKT  = tvb_find_guint8(tvb, tvb_offset, tvb_len, '{');
			tvb_offset = tvb_LBRKT;
			ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_offset-tvb_previous_offset,
				"%s",tvb_format_text(tvb, tvb_previous_offset, tvb_offset-tvb_previous_offset+1));
			message_body_tree = proto_item_add_subtree(ti, ett_megaco_message_body);

			my_proto_tree_add_string(message_body_tree, hf_megaco_transaction, tvb,
				tvb_previous_offset, tokenlen,
				"TransactionResponseAck" );

			tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_offset+1);
			tvb_current_offset = tvb_find_guint8(tvb, tvb_offset+1, tvb_len, '}');
			tvb_current_offset = megaco_tvb_skip_wsp_return(tvb, tvb_current_offset)-1; /* cut last RBRKT */
			len = tvb_current_offset - tvb_previous_offset;

			if (check_col(pinfo->cinfo, COL_INFO) )
				col_add_fstr(pinfo->cinfo, COL_INFO, "%s TransactionResponseAck",
				tvb_format_text(tvb,tvb_previous_offset,len));

				trx_id = strtoul(tvb_format_text(tvb,tvb_offset,len),NULL,10);

			if(tree)
				my_proto_tree_add_string(message_body_tree, hf_megaco_transid, tvb,
				tvb_previous_offset, len,
				tvb_format_text(tvb,tvb_previous_offset,len));

				if(global_megaco_raw_text){
					tvb_raw_text_add(tvb, megaco_tree);
				}
			tvb_previous_offset = tvb_LBRKT +1;
			return;
		/* Pe and PN is transactionPending, P+"any char" is transactionReply */
		case PENDINGTOKEN:
			trx_type = GCP_TRX_PENDING;

			tvb_offset  = tvb_find_guint8(tvb, tvb_previous_offset, tvb_len, '=')+1;
			tvb_offset = megaco_tvb_skip_wsp(tvb, tvb_offset);
			tvb_LBRKT  = tvb_find_guint8(tvb, tvb_offset, tvb_len, '{');
			tvb_current_offset = tvb_LBRKT;
			ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset,
				"%s",tvb_format_text(tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset+1));
			message_body_tree = proto_item_add_subtree(ti, ett_megaco_message_body);

			tvb_current_offset  = megaco_tvb_skip_wsp_return(tvb, tvb_current_offset-1);
			len = tvb_current_offset - tvb_offset;
			if (tree)
				my_proto_tree_add_string(message_body_tree, hf_megaco_transaction, tvb,
					tvb_previous_offset, tokenlen,
					"Pending" );

			if (check_col(pinfo->cinfo, COL_INFO) )
				col_add_fstr(pinfo->cinfo, COL_INFO, "%s Pending",
				tvb_format_text(tvb,tvb_offset,len));
				trx_id = strtoul(tvb_format_text(tvb,tvb_offset,len),NULL,10);

			if(tree)
				my_proto_tree_add_string(message_body_tree, hf_megaco_transid, tvb,
				tvb_offset, len,
				tvb_format_text(tvb,tvb_offset,len));
			return;

		/* transactionReply */
		case REPLYTOKEN:
			trx_type = GCP_TRX_REPLY;
			tvb_LBRKT  = tvb_find_guint8(tvb, tvb_offset, tvb_len, '{');
			ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_LBRKT-tvb_previous_offset,
					"%s",tvb_format_text(tvb, tvb_previous_offset, tvb_LBRKT-tvb_previous_offset+1));
			message_body_tree = proto_item_add_subtree(ti, ett_megaco_message_body);

			if (tree)
				my_proto_tree_add_string(message_body_tree, hf_megaco_transaction, tvb,
					tvb_previous_offset, tokenlen,
					"Reply" );

			tvb_offset  = tvb_find_guint8(tvb, tvb_previous_offset, tvb_len, '=')+1;
			tvb_offset = megaco_tvb_skip_wsp(tvb, tvb_offset);
			tvb_current_offset  = megaco_tvb_skip_wsp_return(tvb, tvb_LBRKT-1);
			len = tvb_current_offset - tvb_offset;

			if (check_col(pinfo->cinfo, COL_INFO) )
				col_add_fstr(pinfo->cinfo, COL_INFO, "%s Reply  ",
				tvb_format_text(tvb,tvb_offset,len));
				trx_id = strtoul(tvb_format_text(tvb,tvb_offset,len),NULL,10);

			if(tree)
				my_proto_tree_add_string(message_body_tree, hf_megaco_transid, tvb,
					tvb_offset, len, tvb_format_text(tvb,tvb_offset,len));

			/* Find if we have a errorDescriptor or actionReplyList */
			tvb_offset = megaco_tvb_skip_wsp(tvb, tvb_LBRKT+1);
			tempchar = tvb_get_guint8(tvb,tvb_offset);
			if ((tempchar == 'E')||(tempchar == 'e')){
				dissect_megaco_errordescriptor(tvb, megaco_tree, tvb_len-1, tvb_offset);
				return;
			}
			/* Offset should be at first printarable char after { */
			tvb_previous_offset = tvb_offset;
			break;
		case TRANSTOKEN:
			/* TransactionRequest 	*/
			trx_type = GCP_TRX_REQUEST;
			tvb_LBRKT  = tvb_find_guint8(tvb, tvb_offset, tvb_len, '{');
			tvb_current_offset = tvb_LBRKT;
			ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset,
					"%s",tvb_format_text(tvb, tvb_previous_offset, tvb_current_offset-tvb_previous_offset+1));
			message_body_tree = proto_item_add_subtree(ti, ett_megaco_message_body);

			if(tree)
				my_proto_tree_add_string(message_body_tree, hf_megaco_transaction, tvb,
					tvb_previous_offset, tokenlen,
					"Request" );
			tvb_offset  = tvb_find_guint8(tvb, tvb_offset, tvb_len, '=')+1;
			tvb_offset = megaco_tvb_skip_wsp(tvb, tvb_offset);
			tvb_current_offset  = megaco_tvb_skip_wsp_return(tvb, tvb_current_offset-1);
			len = tvb_current_offset - tvb_offset;
			if (check_col(pinfo->cinfo, COL_INFO) )
				col_add_fstr(pinfo->cinfo, COL_INFO, "%s Request",
				tvb_format_text(tvb,tvb_offset,len));
				trx_id = strtoul(tvb_format_text(tvb,tvb_offset,len),NULL,10);
			if(tree)
				my_proto_tree_add_string(message_body_tree, hf_megaco_transid, tvb, tvb_offset,len,
					tvb_format_text(tvb,tvb_offset,len));
			/* Offset should be at first printarable char after { */
			tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_LBRKT+1);

			break;
		default :
			ti = proto_tree_add_item(tree,proto_megaco,tvb, 0, -1, FALSE);
			megaco_tree = proto_item_add_subtree(ti, ett_megaco);
			proto_tree_add_text(megaco_tree, tvb, 0, -1,
			"Sorry, can't understand errorDescriptor / transactionList = %s, can't parse it pos %u",
					    tvb_format_text(tvb,tvb_previous_offset,2),tvb_previous_offset);
			return;
		} /* end switch */
/* 		Only these remains now
 *		transactionReply = ReplyToken EQUAL TransactionID LBRKT
 *			[ ImmAckRequiredToken COMMA]( errorDescriptor / actionReplyList ) RBRKT
 *			ReplyToken = ("Reply" / "P")
 *
 *	    errorDescriptor   = ErrorToken EQUAL ErrorCode
 *                     LBRKT [quotedString] RBRKT
 *
 *		transactionRequest = TransToken EQUAL TransactionID LBRKT
 *			actionRequest *(COMMA actionRequest) RBRKT
 *			TransToken = ("Transaction" / "T")
 */

		trx = gcp_trx(msg , trx_id , trx_type, keep_persistent_data);

		/* Find Context */
nextcontext:




		tvb_next_offset = tvb_find_guint8(tvb, tvb_previous_offset,	tvb_len, '{');
		ti = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tvb_next_offset-tvb_previous_offset+1,
				"%s", tvb_format_text(tvb, tvb_previous_offset, tvb_next_offset-tvb_previous_offset+1));
		megaco_context_tree = proto_item_add_subtree(ti, ett_megaco_context);

		tvb_previous_offset = tvb_find_guint8(tvb, tvb_current_offset,
			tvb_len, '=')+1;
		tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_previous_offset);
		if (tvb_current_offset >= tvb_next_offset) {
			proto_tree_add_text(megaco_tree, tvb, 0, 0, "[ Parse error: Invalid offset ]");
			return;
		}
		tvb_current_offset = tvb_next_offset;


		tokenlen = tvb_current_offset - tvb_previous_offset;
		tempchar = tvb_get_guint8(tvb, tvb_previous_offset );

		if (tvb_get_guint8(tvb, tvb_current_offset-1 ) == ' '){
			tokenlen--;
		}


		switch ( tempchar ){
		case '$':
			ctx_id = CHOOSE_CONTEXT;
			my_proto_tree_add_string(megaco_context_tree, hf_megaco_Context, tvb,
				tvb_previous_offset, 1,
				"Choose one");
			if (check_col(pinfo->cinfo, COL_INFO) )
				col_append_str(pinfo->cinfo, COL_INFO, " |=Choose one");
			break;
		case '*':
			ctx_id = ALL_CONTEXTS;
			my_proto_tree_add_string(megaco_context_tree, hf_megaco_Context, tvb,
				tvb_previous_offset, 1,
				"All");
			if (check_col(pinfo->cinfo, COL_INFO) )
				col_append_str(pinfo->cinfo, COL_INFO, " |=All");
			break;
		case '-':
			ctx_id = NULL_CONTEXT;
			proto_tree_add_text(megaco_context_tree, tvb, tvb_previous_offset, tokenlen, "Context: NULL" );
			if (check_col(pinfo->cinfo, COL_INFO) )
				col_append_str(pinfo->cinfo, COL_INFO, " |=NULL");
			break;
		default:
			my_proto_tree_add_string(megaco_context_tree, hf_megaco_Context, tvb,
				tvb_previous_offset, tokenlen,
				tvb_format_text(tvb, tvb_previous_offset,
				tokenlen));
			ctx_id = strtoul(tvb_format_text(tvb, tvb_previous_offset, tokenlen),NULL,10);

			if (check_col(pinfo->cinfo, COL_INFO) )
				col_append_fstr(pinfo->cinfo, COL_INFO, " |=%s",tvb_format_text(tvb, tvb_previous_offset,tokenlen));
		}

		ctx = gcp_ctx(msg,trx,ctx_id,keep_persistent_data);

		/* Find Commands */

		/* If Transaction is is Request, Reply or Pending */
		tvb_command_start_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset +1);
		tvb_command_end_offset = tvb_command_start_offset;

		tvb_LBRKT = tvb_command_start_offset;
		tvb_RBRKT = tvb_command_start_offset;

		/* The following loop find the individual contexts, commands and call the for every Descriptor a subroutine */

		do {
			tvb_command_end_offset = tvb_find_guint8(tvb, tvb_command_end_offset +1,
				tvb_len, ',');

			if ( tvb_command_end_offset == -1 ){
				tvb_command_end_offset = tvb_len;

			}

			/* checking how many left brackets are before the next comma */

			while ( tvb_find_guint8(tvb, tvb_LBRKT+1,tvb_len, '{') != -1
				&& (tvb_find_guint8(tvb, tvb_LBRKT+1,tvb_len, '{') < tvb_command_end_offset)){

				tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT+1,
					tvb_len, '{');

				LBRKT_counter++;
			}

			/* checking how many right brackets are before the next comma */

			while ( (tvb_find_guint8(tvb, tvb_RBRKT+1,tvb_len, '}') != -1 )
				&& (tvb_find_guint8(tvb, tvb_RBRKT+1,tvb_len, '}') < tvb_command_end_offset)
				&& LBRKT_counter != 0){

				tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1,
					tvb_len, '}');
				RBRKT_counter++;


			}

			/* If equal or more right brackets before the comma, one command is complete */

			if ( LBRKT_counter <= RBRKT_counter ){

				tvb_current_offset  = tvb_find_guint8(tvb, tvb_command_start_offset,
					tvb_len, '{');


				/* includes no descriptors */

				if ( LBRKT_counter == 0 ){

					tvb_current_offset = tvb_command_end_offset;

					/* the last command in a context */

					if ( tvb_find_guint8(tvb, tvb_command_start_offset, tvb_len, '}') < tvb_current_offset
						&& tvb_find_guint8(tvb, tvb_command_start_offset, tvb_len, '}') != -1){

						tvb_previous_offset  = tvb_find_guint8(tvb, tvb_command_start_offset,
							tvb_len, '}');

						len = tvb_previous_offset - tvb_command_start_offset;

						tvb_previous_offset = megaco_tvb_skip_wsp_return(tvb, tvb_previous_offset -1);

						tokenlen =  tvb_previous_offset - tvb_command_start_offset;

					}

					/* not the last command in a context*/

					else{
						len =  tvb_current_offset - tvb_command_start_offset;
						tvb_current_offset = megaco_tvb_skip_wsp_return(tvb, tvb_current_offset -1);

						tokenlen =  tvb_current_offset - tvb_command_start_offset;
					}
				}

				/* command includes descriptors */

				else{
					len =  tvb_current_offset - tvb_command_start_offset;
					tvb_current_offset = megaco_tvb_skip_wsp_return(tvb, tvb_current_offset -1);

					tokenlen =  tvb_current_offset - tvb_command_start_offset;
				}

				/* if a next context is specified */

				if ( tvb_get_guint8(tvb, tvb_command_start_offset ) == 'C'){
					tvb_current_offset = tvb_command_start_offset;
					tvb_previous_offset = tvb_command_start_offset;
					LBRKT_counter = 0;
					RBRKT_counter = 0;
					goto nextcontext;
				}

				sub_ti = proto_tree_add_text(megaco_tree, tvb, tvb_command_start_offset, len+1,
						"%s", tvb_format_text(tvb, tvb_command_start_offset, len+1));
				megaco_tree_command_line = proto_item_add_subtree(sub_ti, ett_megaco_command_line);
				/* creation of the megaco_tree_command_line additionally Command and Transaction ID will be printed in this line */
				/* Changed to use the lines above. this code is saved if there is complaints
				sub_ti = proto_tree_add_item(megaco_tree,hf_megaco_command_line,tvb,tvb_command_start_offset,tokenlen, FALSE);
				megaco_tree_command_line = proto_item_add_subtree(sub_ti, ett_megaco_command_line);
				*/

				tvb_next_offset = tvb_command_start_offset + tokenlen;

				/* Try to dissect Topology Descriptor before the command */
				if ( tvb_get_guint8(tvb, tvb_command_start_offset ) == 'T') {
					tempchar = tvb_get_guint8(tvb, tvb_command_start_offset+1);

					if ( (tempchar >= 'a')&& (tempchar <= 'z'))
						tempchar = tempchar - 0x20;
	
					if ( tempchar == 'P' || tempchar == 'O'){
						gint tvb_topology_end_offset = tvb_find_guint8(tvb, tvb_command_start_offset, tvb_len, '}');
						if ( tvb_topology_end_offset == -1 ){
							proto_tree_add_text(megaco_tree, tvb, 0, 0, "[ Parse error: Missing \"}\" ]");
							return;
						}

						tvb_command_start_offset = tvb_find_guint8(tvb, tvb_command_start_offset, tvb_len, '{');
						if ( tvb_command_start_offset == -1 ){
							proto_tree_add_text(megaco_tree, tvb, 0, 0, "[ Parse error: Missing \"{\" ]");
							return;
						}
						dissect_megaco_topologydescriptor(tvb, megaco_tree_command_line, tvb_topology_end_offset-1, tvb_command_start_offset+1);
						
						/* Command after Topology Descriptor */
						tvb_command_start_offset = tvb_find_guint8(tvb, tvb_topology_end_offset + 1,
							tvb_len, ',');

						if ( tvb_command_start_offset == -1 ){
							/* No Command present after Topology Descriptor */
							break;

						} else {
							/* Try to find the first char of the command */
							tvb_command_start_offset =  megaco_tvb_skip_wsp(tvb, tvb_command_start_offset + 1);
							tvb_next_offset = tvb_find_guint8(tvb, tvb_command_start_offset, tvb_len, '{');
							continue;
						}

					}
				}

				/* Additional value */

				if ( tvb_get_guint8(tvb, tvb_command_start_offset ) == 'O'){

					proto_tree_add_text(megaco_tree_command_line, tvb, tvb_command_start_offset, 2, "O- indicates an optional command" );
					tvb_command_start_offset = tvb_command_start_offset+2;

				}

				/* Additional value */

				if ( tvb_get_guint8(tvb, tvb_command_start_offset ) == 'W'){

					proto_tree_add_text(megaco_tree_command_line, tvb, tvb_command_start_offset, 2, "W- indicates a wildcarded response to a command" );
					tvb_command_start_offset = tvb_command_start_offset+2;

				}



				tvb_offset  = tvb_find_guint8(tvb, tvb_command_start_offset,
					tvb_len, '=');
				if (tvb_offset == -1 ) {
					proto_tree_add_text(megaco_tree, tvb, 0, 0, "[ Parse error: Missing \"=\" ]");
					return;
				}
				tvb_offset = megaco_tvb_skip_wsp_return(tvb, tvb_offset -1);
				tokenlen = tvb_offset - tvb_command_start_offset;

				tempchar = tvb_get_guint8(tvb, tvb_command_start_offset);
				if ( (tempchar >= 'a')&& (tempchar <= 'z'))
					tempchar = tempchar - 0x20;

				if ( tempchar != 'E' ){

					if ( tvb_get_guint8(tvb, 0 ) == '!'){

						switch ( tempchar ){

						case 'A':

							tempchar = tvb_get_guint8(tvb, tvb_command_start_offset+1);
							if ( (tempchar >= 'a')&& (tempchar <= 'z'))
								tempchar = tempchar - 0x20;

							switch ( tempchar ){

							case 'V':
								switch(trx_type) {
									case GCP_TRX_REQUEST: cmd_type = GCP_CMD_AUDITVAL_REPLY; break;
									case GCP_TRX_REPLY: cmd_type = GCP_CMD_AUDITVAL_REQ; break;
									default: cmd_type = GCP_CMD_NONE; break;
								}

								my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
									tvb_command_start_offset, tokenlen,
									"AuditValue");
								if (check_col(pinfo->cinfo, COL_INFO) )
									col_append_str(pinfo->cinfo, COL_INFO, " AuditValue");
								break;

							case 'C':
								switch(trx_type) {
									case GCP_TRX_REQUEST: cmd_type = GCP_CMD_AUDITCAP_REQ; break;
									case GCP_TRX_REPLY: cmd_type = GCP_CMD_AUDITCAP_REPLY; break;
									default: cmd_type = GCP_CMD_NONE; break;
								}
								my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
									tvb_command_start_offset, tokenlen,
									"AuditCapability");
								if (check_col(pinfo->cinfo, COL_INFO) )
									col_append_str(pinfo->cinfo, COL_INFO, " AuditCapability");
								break;

							default:
								switch(trx_type) {
									case GCP_TRX_REQUEST: cmd_type = GCP_CMD_ADD_REQ; break;
									case GCP_TRX_REPLY: cmd_type = GCP_CMD_ADD_REPLY; break;
									default: cmd_type = GCP_CMD_NONE; break;
								}

								my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
									tvb_command_start_offset, tokenlen,
									"Add");
								if (check_col(pinfo->cinfo, COL_INFO) )
									col_append_str(pinfo->cinfo, COL_INFO, " Add");
								break;
							}
							break;

						case 'N':
							switch(trx_type) {
								case GCP_TRX_REQUEST: cmd_type = GCP_CMD_NOTIFY_REQ; break;
								case GCP_TRX_REPLY: cmd_type = GCP_CMD_NOTIFY_REPLY; break;
								default: cmd_type = GCP_CMD_NONE; break;
							}

							my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
								tvb_command_start_offset, tokenlen,
								"Notify");
								if (check_col(pinfo->cinfo, COL_INFO) )
									col_append_str(pinfo->cinfo, COL_INFO, " Notify");
							break;

						case 'M':

							tempchar = tvb_get_guint8(tvb, tvb_command_start_offset+1);
							if ( (tempchar >= 'a')&& (tempchar <= 'z'))
								tempchar = tempchar - 0x20;

							switch ( tempchar ){
							case 'F':
								switch(trx_type) {
									case GCP_TRX_REQUEST: cmd_type = GCP_CMD_MOD_REQ; break;
									case GCP_TRX_REPLY: cmd_type = GCP_CMD_MOD_REPLY; break;
									default: cmd_type = GCP_CMD_NONE; break;
								}

								my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
									tvb_command_start_offset, tokenlen,
									"Modify");
								if (check_col(pinfo->cinfo, COL_INFO) )
									col_append_str(pinfo->cinfo, COL_INFO, " Modify");
								break;

							case 'V':
								switch(trx_type) {
									case GCP_TRX_REQUEST: cmd_type = GCP_CMD_MOVE_REQ; break;
									case GCP_TRX_REPLY: cmd_type = GCP_CMD_MOVE_REPLY; break;
									default: cmd_type = GCP_CMD_NONE; break;
								}
								my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
									tvb_command_start_offset, tokenlen,
									"Move");
								if (check_col(pinfo->cinfo, COL_INFO) )
									col_append_str(pinfo->cinfo, COL_INFO, " Move");
								break;
							}
							break;

						case 'P':
							cmd_type = GCP_CMD_NONE;
							/*
							PackagesToken	= ("Packages"	/ "PG")
							PendingToken	= ("Pending"	/ "PN")
							PriorityToken	= ("Priority"	/ "PR")
							ProfileToken	= ("Profile"	/ "PF")
							*/
							tempchar = tvb_get_guint8(tvb, tvb_command_start_offset+1);
							if ( (tempchar >= 'a')&& (tempchar <= 'z'))
								tempchar = tempchar - 0x20;

							switch ( tempchar ){
							case 'G':
								my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
									tvb_command_start_offset, tokenlen,
									"Packages");
								break;
							case 'N':
								my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
									tvb_command_start_offset, tokenlen,
									"Pending");
								break;
							case 'R':
								my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
									tvb_command_start_offset, tokenlen,
									"Priority");
								break;
							case 'F':
								my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
									tvb_command_start_offset, tokenlen,
									"Profile");
								break;
							}
							break;

						case 'S':
							tempchar = tvb_get_guint8(tvb, tvb_command_start_offset+1);
							if ( (tempchar >= 'a')&& (tempchar <= 'z'))
								tempchar = tempchar - 0x20;

							switch ( tempchar ){

							case 'C':
								switch(trx_type) {
									case GCP_TRX_REQUEST: cmd_type = GCP_CMD_SVCCHG_REQ; break;
									case GCP_TRX_REPLY: cmd_type = GCP_CMD_SVCCHG_REPLY; break;
									default: cmd_type = GCP_CMD_NONE; break;
								}
								my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
									tvb_command_start_offset, tokenlen,
									"ServiceChange");
								break;

							default:
								switch(trx_type) {
									case GCP_TRX_REQUEST: cmd_type = GCP_CMD_SUB_REQ; break;
									case GCP_TRX_REPLY: cmd_type = GCP_CMD_SUB_REPLY; break;
									default: cmd_type = GCP_CMD_NONE; break;
								}
								my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
									tvb_command_start_offset, tokenlen,
									"Subtract");
								if (check_col(pinfo->cinfo, COL_INFO) )
									col_append_str(pinfo->cinfo, COL_INFO, " Subtract");
								break;
							}
							break;

						default:
							tokenlen =  (tvb_RBRKT+1) - tvb_previous_offset;
							tvb_ensure_bytes_exist(tvb, tvb_previous_offset, tokenlen);
							proto_tree_add_string(megaco_tree, hf_megaco_error_Frame, tvb,
								tvb_previous_offset, tokenlen,
								"No Command detectable !");
							return;
						}
					}
					else{
						gchar* command = tvb_format_text(tvb, tvb_command_start_offset, tokenlen);

						if ( g_str_equal(command,"Subtract") ) {
							switch(trx_type) {
								case GCP_TRX_REQUEST: cmd_type = GCP_CMD_SUB_REQ; break;
								case GCP_TRX_REPLY: cmd_type = GCP_CMD_SUB_REPLY; break;
								default: cmd_type = GCP_CMD_NONE; break;
							}
						} else if ( g_str_equal(command,"AuditValue") ) {
							switch(trx_type) {
								case GCP_TRX_REQUEST: cmd_type = GCP_CMD_AUDITVAL_REPLY; break;
								case GCP_TRX_REPLY: cmd_type = GCP_CMD_AUDITVAL_REQ; break;
								default: cmd_type = GCP_CMD_NONE; break;
							}
						} else if ( g_str_equal(command,"AuditCapability") ) {
							switch(trx_type) {
								case GCP_TRX_REQUEST: cmd_type = GCP_CMD_AUDITCAP_REQ; break;
								case GCP_TRX_REPLY: cmd_type = GCP_CMD_AUDITCAP_REPLY; break;
								default: cmd_type = GCP_CMD_NONE; break;
							}
						} else if ( g_str_equal(command,"Add") ) {
							switch(trx_type) {
								case GCP_TRX_REQUEST: cmd_type = GCP_CMD_ADD_REQ; break;
								case GCP_TRX_REPLY: cmd_type = GCP_CMD_ADD_REPLY; break;
								default: cmd_type = GCP_CMD_NONE; break;
							}
						} else if ( g_str_equal(command,"Notify") ) {
							switch(trx_type) {
								case GCP_TRX_REQUEST: cmd_type = GCP_CMD_NOTIFY_REQ; break;
								case GCP_TRX_REPLY: cmd_type = GCP_CMD_NOTIFY_REPLY; break;
								default: cmd_type = GCP_CMD_NONE; break;
							}
						} else if ( g_str_equal(command,"Modify") ) {
							switch(trx_type) {
								case GCP_TRX_REQUEST: cmd_type = GCP_CMD_MOD_REQ; break;
								case GCP_TRX_REPLY: cmd_type = GCP_CMD_MOD_REPLY; break;
								default: cmd_type = GCP_CMD_NONE; break;
							}
						} else if ( g_str_equal(command,"Move") ) {
							switch(trx_type) {
								case GCP_TRX_REQUEST: cmd_type = GCP_CMD_MOVE_REQ; break;
								case GCP_TRX_REPLY: cmd_type = GCP_CMD_MOVE_REPLY; break;
								default: cmd_type = GCP_CMD_NONE; break;
							}
						} else if ( g_str_equal(command,"ServiceChange") ) {
							switch(trx_type) {
								case GCP_TRX_REQUEST: cmd_type = GCP_CMD_SVCCHG_REQ; break;
								case GCP_TRX_REPLY: cmd_type = GCP_CMD_SVCCHG_REPLY; break;
								default: cmd_type = GCP_CMD_NONE; break;
							}
						} else if ( g_str_equal(command,"Subtract") ) {
							switch(trx_type) {
								case GCP_TRX_REQUEST: cmd_type = GCP_CMD_SUB_REQ; break;
								case GCP_TRX_REPLY: cmd_type = GCP_CMD_SUB_REPLY; break;
								default: cmd_type = GCP_CMD_NONE; break;
							}
						} else {
							switch(trx_type) {
								case GCP_TRX_REQUEST: cmd_type = GCP_CMD_OTHER_REQ; break;
								case GCP_TRX_REPLY: cmd_type = GCP_CMD_REPLY; break;
								default: cmd_type = GCP_CMD_NONE; break;
							}
						}


						my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_command, tvb,
							tvb_command_start_offset, tokenlen,
							tvb_format_text(tvb, tvb_command_start_offset,
							tokenlen));
							if (check_col(pinfo->cinfo, COL_INFO) )
								col_append_fstr(pinfo->cinfo, COL_INFO, " %s",command);
					}

					if (cmd_type == GCP_CMD_NONE && trx_type == GCP_TRX_REPLY) {
						cmd_type = GCP_CMD_REPLY;
					}

					if (cmd_type != GCP_CMD_NONE) {
						cmd = gcp_cmd(msg, trx, ctx, cmd_type, tvb_command_start_offset, keep_persistent_data);
						tap_queue_packet(megaco_tap, pinfo, cmd);
					}

					tvb_offset  = tvb_find_guint8(tvb, tvb_command_start_offset,
						tvb_len, '=');
					if (tvb_offset == -1 ) {
						proto_tree_add_text(megaco_tree, tvb, 0, 0, "[ Parse error: Missing \"=\" ]");
						return;
					}
					tvb_offset = megaco_tvb_skip_wsp(tvb, tvb_offset+1);
					tokenlen = tvb_next_offset - tvb_offset;
					if (tokenlen+1 <= 0) {
						proto_tree_add_text(megaco_tree, tvb, 0, 0, "[ Parse error: Invalid token length (%d) ]", tokenlen+1);
						return;
					}

					tempchar = tvb_get_guint8(tvb, tvb_offset);
					if ( (tempchar >= 'a')&& (tempchar <= 'z'))
						tempchar = tempchar - 0x20;

					term = ep_new0(gcp_term_t);
					wild_term = GCP_WILDCARD_NONE;
					term->type = GCP_TERM_TYPE_UNKNOWN;

					switch ( tempchar ){

					case 'E':
						if ((tokenlen+1 > (int) sizeof(TermID))) {
							proto_tree_add_text(megaco_tree, tvb, 0, 0, "[ Parse error: Invalid TermID length (%d) ]", tokenlen+1);
							return;
						}
						tvb_get_nstringz0(tvb,tvb_offset,tokenlen+1,TermID);
						TermID[0] = 'e';

						term->len = tokenlen;
						term->str = (gchar*)(term->buffer = TermID);

						term = gcp_cmd_add_term(msg, trx, cmd, term, wild_term, keep_persistent_data);

						/*** TERM ***/
						my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_termid, tvb,
							tvb_offset, tokenlen,
							TermID);
						break;

					case '*':
						wild_term = GCP_WILDCARD_ALL;
						term->len = 1;
						term->buffer = (guint8*)(term->str = "*");

						term = gcp_cmd_add_term(msg, trx, cmd, term, wild_term, keep_persistent_data);

						my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_termid, tvb,
							tvb_offset, tokenlen,
							"WildCard all");
							if (check_col(pinfo->cinfo, COL_INFO) )
								col_append_str(pinfo->cinfo, COL_INFO, "=*");
						break;

					case '$':
						wild_term = GCP_WILDCARD_CHOOSE;

						term->len = 1;
						term->buffer = (term->str = "$");

						term = gcp_cmd_add_term(msg, trx, cmd, term, wild_term, keep_persistent_data);

						my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_termid, tvb,
							tvb_offset, tokenlen,
							"WildCard any");
							if (check_col(pinfo->cinfo, COL_INFO) )
								col_append_str(pinfo->cinfo, COL_INFO, "=$");
						break;

					default:
						/*** TERM ***/
						my_proto_tree_add_string(megaco_tree_command_line, hf_megaco_termid, tvb,
							tvb_offset, tokenlen,
							tvb_format_text(tvb, tvb_offset,
							tokenlen));

						term->len = tokenlen;
						term->buffer = (guint8*)(term->str = tvb_format_text(tvb, tvb_offset, tokenlen));

						term = gcp_cmd_add_term(msg, trx, cmd, term, wild_term, keep_persistent_data);

							if (check_col(pinfo->cinfo, COL_INFO) )
								col_append_fstr(pinfo->cinfo, COL_INFO, "=%s",tvb_format_text(tvb, tvb_offset,tokenlen));
						break;
					}

			}
			/* Dissect the Descriptors */


			if ( LBRKT_counter != 0 && tvb_current_offset != tvb_command_end_offset){

				tvb_descriptors_start_offset  = tvb_find_guint8(tvb, tvb_command_start_offset,
					tvb_len, '{');

				tvb_descriptors_end_offset = tvb_descriptors_start_offset;


				while ( LBRKT_counter > 0 ){

					tvb_descriptors_end_offset = tvb_find_guint8(tvb, tvb_descriptors_end_offset+1,
						tvb_len, '}');

					LBRKT_counter--;

				}

				tempchar = tvb_get_guint8(tvb, tvb_command_start_offset);

				if ( tempchar == 'E'|| tempchar == 'e'){
					dissect_megaco_descriptors(tvb, megaco_tree, pinfo, tvb_command_start_offset-1,tvb_descriptors_end_offset);
				}
				else {
					dissect_megaco_descriptors(tvb, megaco_tree, pinfo, tvb_descriptors_start_offset,tvb_descriptors_end_offset);
				}
			}
			RBRKT_counter = 0;
			LBRKT_counter = 0;
			tvb_command_start_offset = megaco_tvb_skip_wsp(tvb, tvb_command_end_offset +1);
			tvb_LBRKT = tvb_command_start_offset;
			tvb_RBRKT = tvb_command_start_offset;

			}
		} while ( tvb_command_end_offset < tvb_len );

	if (keep_persistent_data) {
		gcp_msg_to_str(msg,keep_persistent_data);
		gcp_analyze_msg(megaco_tree, tvb, msg, &megaco_ctx_ids );
	}

	if(global_megaco_raw_text){
		tvb_raw_text_add(tvb, megaco_tree);
	}
}

#define MEGACO_MODEM_TOKEN			1
#define MEGACO_MUX_TOKEN			2
#define MEGACO_MEDIA_TOKEN			3
#define MEGACO_SIGNALS_TOKEN		4
#define MEGACO_SERVICES_TOKEN		5
#define MEGACO_STATS_TOKEN			6
#define MEGACO_ERROR_TOKEN			7
#define MEGACO_EVENTS_TOKEN			8
#define MEGACO_AUDIT_TOKEN			9
#define MEGACO_DIGITMAP_TOKEN		10
#define MEGACO_OE_TOKEN				11
#define MEGACO_TOPOLOGY_TOKEN		12
#define MEGACO_PACKAGES_TOKEN		13

static const megaco_tokens_t megaco_descriptors_names[] = {
		{ "Unknown-token",	 			NULL }, /* 0 Pad so that the real headers start at index 1 */
		{ "Modem",						"MD" }, /* 1 */
		{ "Mux",						"MX" },	/* 2 */
		{ "Media",						"M" },	/* 3 */
		{ "Signals",					"SG" }, /* 4 */
		{ "Services",					"SV" },	/* 5 */
		{ "Statistics",					"SA" }, /* 6 */
		{ "Error",						"ER" }, /* 7 */
		{ "Events",						"E" },	/* 8 */
		{ "Audit",						"AT" }, /* 9 */
		{ "DigitMap",					"DM" }, /* 10 */
		{ "ObservedEvents",				"OE" }, /* 11 */
		{ "Topology",					"TP" }, /* 12 */
		{ "Packages",					"PG" }, /* 13 */
};

/* Returns index of megaco_tokens_t */
/* note - also called by dissect_megaco_auditdescriptor */
static gint find_megaco_descriptors_names(tvbuff_t *tvb, int offset, guint header_len)
{
	guint i;

	for (i = 1; i < array_length(megaco_descriptors_names); i++) {
		if (header_len == strlen(megaco_descriptors_names[i].name) &&
		    tvb_strncaseeql(tvb, offset, megaco_descriptors_names[i].name, header_len) == 0)
			return i;
		if (megaco_descriptors_names[i].compact_name != NULL &&
		    header_len == strlen(megaco_descriptors_names[i].compact_name) &&
		    tvb_strncaseeql(tvb, offset, megaco_descriptors_names[i].compact_name, header_len) == 0)
			return i;
	}
	return -1;
}

static void
dissect_megaco_descriptors(tvbuff_t *tvb, proto_tree *megaco_tree_command_line, packet_info *pinfo, gint tvb_descriptors_start_offset, gint tvb_descriptors_end_offset)
{
	gint		tvb_len, len, token_index, tvb_offset, temp_offset;
	gint		tvb_current_offset,tvb_previous_offset,tokenlen;
	gint		tvb_RBRKT, tvb_LBRKT,  RBRKT_counter, LBRKT_counter;
	tvb_len  	= tvb_length(tvb);


	len				= 0;
	tvb_RBRKT		= 0;
	tvb_LBRKT		= 0;
	RBRKT_counter	= 0;
	LBRKT_counter	= 0;


	tvb_LBRKT = megaco_tvb_skip_wsp(tvb, tvb_descriptors_start_offset +1);

	tvb_previous_offset = tvb_LBRKT;
	tvb_RBRKT = tvb_descriptors_start_offset;


	do {

		tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1,
			tvb_len, '}');
		tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT,
			tvb_len, '{');

		tvb_current_offset 	= tvb_find_guint8(tvb, tvb_previous_offset,
			tvb_len, ',');

		if (tvb_current_offset == -1 ){
			tvb_current_offset = tvb_descriptors_end_offset;

		}
		if (tvb_current_offset <= tvb_previous_offset) {
			proto_tree_add_text(megaco_tree_command_line, tvb, 0, 0, "[ Parse error: Invalid offset ]");
			return;
		}



		/* Descriptor includes no parameters */

		if ( tvb_LBRKT > tvb_current_offset || tvb_LBRKT == -1 ){

			if ( tvb_current_offset > tvb_RBRKT ){
				tvb_current_offset = tvb_RBRKT;
			}

			tvb_RBRKT = megaco_tvb_skip_wsp_return(tvb, tvb_current_offset-1)-1;
		}

		/* Descriptor includes Parameters */
		if ( (tvb_current_offset > tvb_LBRKT && tvb_LBRKT != -1)){

			while ( tvb_LBRKT != -1 && tvb_RBRKT > tvb_LBRKT ){


				tvb_LBRKT  = tvb_find_guint8(tvb, tvb_LBRKT+1,
					tvb_len, '{');
				if ( tvb_LBRKT < tvb_RBRKT && tvb_LBRKT != -1)
					tvb_RBRKT  = tvb_find_guint8(tvb, tvb_RBRKT+1,tvb_len, '}');
			}

		}

		/* Find token length */
		for (tvb_offset=tvb_previous_offset; tvb_offset < tvb_len-1; tvb_offset++){
			if (!isalpha(tvb_get_guint8(tvb, tvb_offset ))){
				break;
			}
		}
		tokenlen =  tvb_offset - tvb_previous_offset;
		token_index = find_megaco_descriptors_names(tvb, tvb_previous_offset, tokenlen);
		switch ( token_index ){
		case MEGACO_MODEM_TOKEN:
			dissect_megaco_modemdescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_MUX_TOKEN:
			dissect_megaco_multiplexdescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_MEDIA_TOKEN:
			/*TODO: Move tis to the top when all branches fixed !!!*/
			temp_offset = tvb_find_guint8(tvb, tvb_previous_offset,tvb_len, '{');
			tokenlen =  temp_offset - tvb_previous_offset+1;
			proto_tree_add_text(megaco_tree_command_line, tvb, tvb_previous_offset, tokenlen,
				"%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen));

			tvb_previous_offset = megaco_tvb_skip_wsp(tvb, temp_offset +1);
			dissect_megaco_mediadescriptor(tvb, megaco_tree_command_line, pinfo, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_SIGNALS_TOKEN:
			dissect_megaco_signaldescriptor(tvb, pinfo, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_SERVICES_TOKEN:
			dissect_megaco_servicechangedescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_STATS_TOKEN:
			dissect_megaco_statisticsdescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_ERROR_TOKEN:
			dissect_megaco_errordescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_EVENTS_TOKEN:
			dissect_megaco_eventsdescriptor(tvb, pinfo, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_AUDIT_TOKEN:
			dissect_megaco_auditdescriptor(tvb, megaco_tree_command_line, pinfo, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_DIGITMAP_TOKEN:
			dissect_megaco_digitmapdescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_OE_TOKEN:
			/* ObservedEventsToken */
			dissect_megaco_observedeventsdescriptor(tvb, pinfo, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_TOPOLOGY_TOKEN:
			dissect_megaco_topologydescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset);
			break;
		case MEGACO_PACKAGES_TOKEN:
			dissect_megaco_Packagesdescriptor(tvb, megaco_tree_command_line, tvb_RBRKT, tvb_previous_offset);
			break;
		default:
			tokenlen =  (tvb_RBRKT+1) - tvb_previous_offset;
			proto_tree_add_string(megaco_tree_command_line, hf_megaco_error_Frame, tvb,
				tvb_previous_offset, tokenlen,
				"No Descriptor detectable !");
			break;
		}

		tokenlen =  (tvb_RBRKT+1) - tvb_previous_offset;

		tvb_current_offset  	= tvb_find_guint8(tvb, tvb_RBRKT, tvb_len, ',');
		if (tvb_current_offset == -1 ){
			tvb_current_offset = tvb_descriptors_end_offset;
		}
		tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset+1);
		tvb_LBRKT = tvb_previous_offset;
		tvb_RBRKT = tvb_previous_offset;

    } while ( tvb_current_offset < tvb_descriptors_end_offset );

}

static void
dissect_megaco_modemdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line,  gint tvb_RBRKT, gint tvb_previous_offset)
{

	gint 	tokenlen;

	tokenlen = 0;



	tokenlen =  (tvb_RBRKT+1) - tvb_previous_offset;
	proto_tree_add_string(megaco_tree_command_line, hf_megaco_modem_descriptor, tvb,
					 		tvb_previous_offset, tokenlen,
							tvb_format_text(tvb, tvb_previous_offset,
							tokenlen));

}
static void
dissect_megaco_multiplexdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line,  gint tvb_RBRKT, gint tvb_previous_offset)
{

	gint 	tokenlen;

	tokenlen = 0;

	tokenlen =  (tvb_RBRKT+1) - tvb_previous_offset;
	proto_tree_add_string(megaco_tree_command_line, hf_megaco_multiplex_descriptor, tvb,
					 		tvb_previous_offset, tokenlen,
							tvb_format_text(tvb, tvb_previous_offset,
							tokenlen));

}

/* mediaDescriptor = MediaToken LBRKT mediaParm *(COMMA mediaParm) RBRKT
 *	MediaToken = ("Media" / "M")
 *
 *		mediaParm = (streamParm / streamDescriptor /terminationStateDescriptor)
 *
 *	; at-most one terminationStateDescriptor
 *	; and either streamParm(s) or streamDescriptor(s) but not both
 *			streamParm = ( localDescriptor / remoteDescriptor /localControlDescriptor )
 *				localDescriptor = LocalToken LBRKT octetString RBRKT
 *							LocalToken = ("Local" / "L")
 *							octetString = *(nonEscapeChar)
 *									nonEscapeChar = ( "\}" / %x01-7C / %x7E-FF )
 *				remoteDescriptor = RemoteToken LBRKT octetString RBRKT
 *							RemoteToken = ("Remote" / "R")
 *				localControlDescriptor = LocalControlToken LBRKT localParm*(COMMA localParm) RBRKT
 *							LocalControlToken = ("LocalControl" / "O")
 *							localParm = ( streamMode / propertyParm / reservedValueMode
 *			streamDescriptor = StreamToken EQUAL StreamID LBRKT streamParm*(COMMA streamParm) RBRKT
 *							StreamToken = ("Stream" / "ST")
 *			terminationStateDescriptor = TerminationStateToken LBRKTterminationStateParm
 *								*( COMMA terminationStateParm ) RBRKT
 *							TerminationStateToken = ("TerminationState" / "TS")
 *							terminationStateParm =(propertyParm / serviceStates / eventBufferControl )
 */

#define MEGACO_LOCAL_TOKEN				1
#define MEGACO_REMOTE_TOKEN				2
#define MEGACO_LOCAL_CONTROL_TOKEN		3
#define MEGACO_STREAM_TOKEN				4
#define MEGACO_TERMINATION_STATE_DESC	5

static const megaco_tokens_t megaco_mediaParm_names[] = {
		{ "Unknown-token",	 			NULL }, /* 0 Pad so that the real headers start at index 1 */
		{ "Local",						"L" },	/* 1 */
		{ "Remote",						"R" },	/* 2 */
		{ "LocalControl",				"O" },	/* 3 */
		{ "Stream",						"ST" },	/* 4 */
		{ "TerminationState",			"TS" },	/* 5 */
};

/* Returns index of megaco_tokens_t */
static gint find_megaco_mediaParm_names(tvbuff_t *tvb, int offset, guint header_len)
{
        guint i;

        for (i = 1; i < array_length(megaco_mediaParm_names); i++) {
                if (header_len == strlen(megaco_mediaParm_names[i].name) &&
                    tvb_strncaseeql(tvb, offset, megaco_mediaParm_names[i].name, header_len) == 0)
                        return i;
                if (megaco_mediaParm_names[i].compact_name != NULL &&
                    header_len == strlen(megaco_mediaParm_names[i].compact_name) &&
                    tvb_strncaseeql(tvb, offset, megaco_mediaParm_names[i].compact_name, header_len) == 0)
                        return i;
        }

        return -1;
}

static void
dissect_megaco_mediadescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line,packet_info *pinfo,  gint tvb_last_RBRKT, gint tvb_previous_offset)
{

	gint 	tokenlen, tvb_LBRKT, tvb_RBRKT;
	gint	tvb_next_offset, tvb_current_offset, tvb_offset,  equal_offset;
	gint	mediaParm;


	proto_tree  *megaco_mediadescriptor_tree, *megaco_mediadescriptor_ti;

	tokenlen			= 0;
	tvb_next_offset		= 0;
	tvb_current_offset	= 0;
	tvb_offset			= 0;

	/*
	megaco_mediadescriptor_ti = proto_tree_add_text(megaco_tree_command_line,tvb,tvb_previous_offset,tokenlen,"Media Descriptor");
	megaco_mediadescriptor_tree = proto_item_add_subtree(megaco_mediadescriptor_ti, ett_megaco_mediadescriptor);
	*/
	while ( tvb_previous_offset < tvb_last_RBRKT){
		/* Start of token */
		tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_previous_offset);

		/* Find token length */
		for (tvb_next_offset=tvb_current_offset; tvb_next_offset < tvb_last_RBRKT; tvb_next_offset++){
				if (!isalpha(tvb_get_guint8(tvb, tvb_next_offset ))){
				break;
			}
		}
		tokenlen = tvb_next_offset - tvb_current_offset;

		mediaParm = find_megaco_mediaParm_names(tvb, tvb_current_offset, tokenlen);

		tvb_LBRKT = tvb_find_guint8(tvb, tvb_next_offset , tvb_last_RBRKT, '{');
		tvb_next_offset = tvb_find_guint8(tvb, tvb_current_offset+1 , tvb_last_RBRKT, '}');
		tvb_RBRKT = tvb_next_offset;

		tokenlen = tvb_LBRKT - tvb_current_offset +1;
		megaco_mediadescriptor_ti = proto_tree_add_text(megaco_tree_command_line,tvb,tvb_current_offset,
				tokenlen,"%s",tvb_format_text(tvb, tvb_current_offset,tokenlen));

		switch ( mediaParm ){
		case MEGACO_LOCAL_TOKEN:
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_LBRKT+1);
			dissect_megaco_Localdescriptor(tvb,megaco_tree_command_line , pinfo,
				tvb_RBRKT, tvb_current_offset);
			tvb_current_offset = tvb_RBRKT;
			break;
		case MEGACO_REMOTE_TOKEN:
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_LBRKT+1);
			dissect_megaco_Localdescriptor(tvb,megaco_tree_command_line , pinfo,
				tvb_RBRKT, tvb_current_offset);
			tvb_current_offset = tvb_RBRKT;
			break;
		case MEGACO_LOCAL_CONTROL_TOKEN:
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_LBRKT+1);
			dissect_megaco_LocalControldescriptor(tvb,megaco_tree_command_line, pinfo ,
				tvb_RBRKT, tvb_current_offset);
			tvb_current_offset = tvb_RBRKT;
			break;
		case MEGACO_STREAM_TOKEN:
			megaco_mediadescriptor_tree = proto_item_add_subtree(megaco_mediadescriptor_ti, ett_megaco_mediadescriptor);

			equal_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_last_RBRKT, '=');
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, equal_offset+1);
			tvb_offset = megaco_tvb_skip_wsp_return(tvb, tvb_LBRKT-1);
			tokenlen =  tvb_offset - tvb_current_offset;

			proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_streamid, tvb,
				tvb_current_offset, tokenlen, tvb_format_text(tvb, tvb_current_offset,tokenlen));
			tvb_previous_offset = tvb_LBRKT+1;
			continue;
		case MEGACO_TERMINATION_STATE_DESC:
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_LBRKT+1);
			dissect_megaco_TerminationStatedescriptor(tvb,megaco_tree_command_line ,
				tvb_RBRKT, tvb_current_offset);
			tvb_current_offset = tvb_RBRKT;
			break;
		default:
			break;
		};
		/* more parameters ? */
		tvb_next_offset = tvb_find_guint8(tvb, tvb_current_offset+1 , tvb_last_RBRKT, ',');
		if ( tvb_next_offset != -1){
			tokenlen = tvb_next_offset - tvb_RBRKT+1;
			proto_tree_add_text(megaco_tree_command_line, tvb, tvb_RBRKT, tokenlen,
				"%s", tvb_format_text(tvb, tvb_RBRKT, tokenlen));
			tvb_previous_offset = tvb_next_offset+1;
		}else{
			/* Add the trailing '}'*/
			proto_tree_add_text(megaco_tree_command_line, tvb, tvb_RBRKT, 1,
				"%s", tvb_format_text(tvb, tvb_RBRKT, 1));
			tvb_previous_offset = tvb_last_RBRKT;
		}

	} /* End while */
}

static void
dissect_megaco_h245(tvbuff_t *tvb, packet_info *pinfo, proto_tree *megaco_tree, gint offset, gint len, gchar *msg)
{
	proto_item *item;
	proto_tree *tree;
	guint8 *buf = ep_alloc(10240);

	/*item=proto_tree_add_string(megaco_tree, hf_megaco_h245, tvb,
		offset, len, msg );
		*/
	item = proto_tree_add_text(megaco_tree, tvb, offset, len,
			"%s", msg);

	tree = proto_item_add_subtree(item, ett_megaco_h245);

	/* arbitrary maximum length */
	if(len<20480){
		int i;
		tvbuff_t *h245_tvb;

		/* first, skip to where the encoded pdu starts, this is
		   the first hex digit after the '=' char.
		*/
		while(1){
			if((*msg==0)||(*msg=='\n')){
				return;
			}
			if(*msg=='='){
				msg++;
				break;
			}
			msg++;
		}
		while(1){
			if((*msg==0)||(*msg=='\n')){
				return;
			}
			if( ((*msg>='0')&&(*msg<='9'))
			||  ((*msg>='a')&&(*msg<='f'))
			||  ((*msg>='A')&&(*msg<='F'))){
				break;
			}
			msg++;
		}
		i=0;
		while( ((*msg>='0')&&(*msg<='9'))
		     ||((*msg>='a')&&(*msg<='f'))
		     ||((*msg>='A')&&(*msg<='F'))  ){
			int val;
			if((*msg>='0')&&(*msg<='9')){
				val=(*msg)-'0';
			} else if((*msg>='a')&&(*msg<='f')){
				val=(*msg)-'a'+10;
			} else if((*msg>='A')&&(*msg<='F')){
				val=(*msg)-'A'+10;
			} else {
				return;
			}
			val<<=4;
			msg++;
			if((*msg>='0')&&(*msg<='9')){
				val|=(*msg)-'0';
			} else if((*msg>='a')&&(*msg<='f')){
				val|=(*msg)-'a'+10;
			} else if((*msg>='A')&&(*msg<='F')){
				val|=(*msg)-'A'+10;
			} else {
				return;
			}
			msg++;

			buf[i]=(guint8)val;
			i++;
		}
		if(i==0){
			return;
		}
		h245_tvb = tvb_new_child_real_data(tvb, buf,i,i);
		add_new_data_source(pinfo, h245_tvb, "H.245 over MEGACO");
		/* should go through a handle, however,  the two h245 entry
		   points are different, one is over tpkt and the other is raw
		*/
		call_dissector(h245_handle, h245_tvb, pinfo, top_tree);
/*		dissect_h245_MultimediaSystemControlMessage(h245_tvb, pinfo, tree);*/
	}
}

static void
dissect_megaco_h324_h223caprn(tvbuff_t *tvb, packet_info *pinfo, proto_tree *megaco_tree, gint offset _U_, gint len, gchar *msg)
{
	guint8 *buf = ep_alloc(10240);
	asn1_ctx_t actx;

	/* arbitrary maximum length */
	if(len<20480){
		int i;
		tvbuff_t *h245_tvb;

		/* first, skip to where the encoded pdu starts, this is
		   the first hex digit after the '=' char.
		*/
		while(1){
			if((*msg==0)||(*msg=='\n')){
				return;
			}
			if(*msg=='='){
				msg++;
				break;
			}
			msg++;
		}
		while(1){
			if((*msg==0)||(*msg=='\n')){
				return;
			}
			if( ((*msg>='0')&&(*msg<='9'))
			||  ((*msg>='a')&&(*msg<='f'))
			||  ((*msg>='A')&&(*msg<='F'))){
				break;
			}
			msg++;
		}
		i=0;
		while( ((*msg>='0')&&(*msg<='9'))
		     ||((*msg>='a')&&(*msg<='f'))
		     ||((*msg>='A')&&(*msg<='F'))  ){
			int val;
			if((*msg>='0')&&(*msg<='9')){
				val=(*msg)-'0';
			} else if((*msg>='a')&&(*msg<='f')){
				val=(*msg)-'a'+10;
			} else if((*msg>='A')&&(*msg<='F')){
				val=(*msg)-'A'+10;
			} else {
				return;
			}
			val<<=4;
			msg++;
			if((*msg>='0')&&(*msg<='9')){
				val|=(*msg)-'0';
			} else if((*msg>='a')&&(*msg<='f')){
				val|=(*msg)-'a'+10;
			} else if((*msg>='A')&&(*msg<='F')){
				val|=(*msg)-'A'+10;
			} else {
				return;
			}
			msg++;

			buf[i]=(guint8)val;
			i++;
		}
		if(i==0){
			return;
		}
		h245_tvb = tvb_new_child_real_data(tvb, buf,i,i);
		add_new_data_source(pinfo, h245_tvb, "H.245 over MEGACO");
		/* should go through a handle, however,  the two h245 entry
		   points are different, one is over tpkt and the other is raw
		*/
		asn1_ctx_init(&actx, ASN1_ENC_PER, TRUE, pinfo);
		dissect_h245_H223Capability(h245_tvb, 0, &actx, megaco_tree, hf_megaco_h223Capability);
	}
}

static void
dissect_megaco_eventsdescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *megaco_tree_command_line,  gint tvb_RBRKT, gint tvb_previous_offset)
{

	gint tokenlen, tvb_current_offset, tvb_next_offset, tvb_help_offset;
	gint tvb_events_end_offset, tvb_events_start_offset, tvb_LBRKT;
	proto_tree  *megaco_eventsdescriptor_tree, *megaco_eventsdescriptor_ti;

	guint8 tempchar;
	gint requested_event_start_offset, requested_event_end_offset;
	proto_tree	*megaco_requestedevent_tree, *megaco_requestedevent_ti;

	tokenlen						= 0;
	tvb_current_offset				= 0;
	tvb_next_offset					= 0;
	tvb_help_offset					= 0;
	tvb_events_end_offset			= 0;
	tvb_events_start_offset			= 0;
	tvb_help_offset					= 0;
	requested_event_start_offset	= 0;
	requested_event_end_offset		= 0;

	tokenlen =  (tvb_RBRKT+1) - tvb_previous_offset;

	megaco_eventsdescriptor_ti = proto_tree_add_text(megaco_tree_command_line, tvb, tvb_previous_offset, tokenlen,
		"%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen));

	/*
	megaco_eventsdescriptor_ti = proto_tree_add_item(megaco_tree_command_line,hf_megaco_events_descriptor,tvb,tvb_previous_offset,tokenlen, FALSE);
	*/
	megaco_eventsdescriptor_tree = proto_item_add_subtree(megaco_eventsdescriptor_ti, ett_megaco_eventsdescriptor);

	tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '=');
	tvb_next_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{');

	if ( tvb_current_offset < tvb_RBRKT && tvb_current_offset != -1 ){

		tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset +1);
		tvb_help_offset = megaco_tvb_skip_wsp_return(tvb, tvb_next_offset-1);

		tokenlen =  tvb_help_offset - tvb_current_offset;

		proto_tree_add_string(megaco_eventsdescriptor_tree, hf_megaco_requestid, tvb,
			tvb_current_offset, tokenlen,
			tvb_format_text(tvb, tvb_current_offset,
			tokenlen));

		tvb_events_end_offset   = tvb_RBRKT;
		tvb_events_start_offset = tvb_previous_offset;

		tvb_RBRKT = tvb_next_offset+1;
		tvb_LBRKT = tvb_next_offset+1;
		tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_next_offset+1);


		do {

			tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1,
				tvb_events_end_offset, '}');
			tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT,
				tvb_events_end_offset, '{');

			tvb_current_offset 	= tvb_find_guint8(tvb, tvb_previous_offset,
				tvb_events_end_offset, ',');

			if (tvb_current_offset == -1 || tvb_current_offset > tvb_events_end_offset){
				tvb_current_offset = tvb_events_end_offset;
			}


			/* Descriptor includes no parameters */

			if ( tvb_LBRKT > tvb_current_offset || tvb_LBRKT == -1 ){

				tvb_RBRKT = megaco_tvb_skip_wsp_return(tvb, tvb_current_offset-1)-1;
			}

			/* Descriptor includes Parameters */

			if ( (tvb_current_offset > tvb_LBRKT && tvb_LBRKT != -1)){

				while ( tvb_LBRKT != -1 && tvb_RBRKT > tvb_LBRKT ){

					tvb_LBRKT  = tvb_find_guint8(tvb, tvb_LBRKT+1,
						tvb_events_end_offset, '{');
					if ( tvb_LBRKT < tvb_RBRKT && tvb_LBRKT != -1)
						tvb_RBRKT  = tvb_find_guint8(tvb, tvb_RBRKT+1,
						tvb_events_end_offset, '}');
				}

			}

			tvb_help_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_events_end_offset, '{');

			/* if there are eventparameter  */

			if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){

				requested_event_start_offset = tvb_help_offset;
				requested_event_end_offset	 = tvb_RBRKT;
				tvb_help_offset = megaco_tvb_skip_wsp_return(tvb, tvb_help_offset-1);
				tokenlen = tvb_help_offset - tvb_previous_offset;
			}
			/* no parameters */
			else {
				tokenlen = tvb_RBRKT+1 - tvb_previous_offset;
			}

			megaco_requestedevent_ti = proto_tree_add_item(megaco_eventsdescriptor_tree,hf_megaco_pkgdname,tvb,tvb_previous_offset,tokenlen, FALSE);
			megaco_requestedevent_tree = proto_item_add_subtree(megaco_requestedevent_ti, ett_megaco_requestedevent);

			if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){

				tvb_help_offset = megaco_tvb_skip_wsp(tvb, requested_event_start_offset +1);
				tempchar = tvb_get_guint8(tvb, tvb_help_offset);

				requested_event_start_offset = megaco_tvb_skip_wsp(tvb, requested_event_start_offset +1);
				requested_event_end_offset = megaco_tvb_skip_wsp_return(tvb, requested_event_end_offset-1);

				if ( tempchar == 'D' || tempchar == 'd'){
					dissect_megaco_digitmapdescriptor(tvb, megaco_requestedevent_tree, requested_event_end_offset, requested_event_start_offset);
				}
				else{
					gchar *msg;

					tokenlen = 	requested_event_end_offset - requested_event_start_offset;
					msg=tvb_format_text(tvb,requested_event_start_offset, tokenlen);
					if(!strncmp("h245", msg, 4)){
						dissect_megaco_h245(tvb, pinfo, megaco_requestedevent_tree, requested_event_start_offset, tokenlen, msg);
					} else {
						proto_tree_add_text(megaco_requestedevent_tree, tvb, requested_event_start_offset, tokenlen,
							"%s", msg);
					}
				}

			}

			tvb_previous_offset = tvb_current_offset;
			tvb_current_offset  = tvb_find_guint8(tvb, tvb_RBRKT,
				tvb_events_end_offset, ',');

			if (tvb_current_offset == -1 || tvb_current_offset > tvb_events_end_offset || tvb_current_offset < tvb_previous_offset ) {
				tvb_current_offset = tvb_events_end_offset;
			}

			tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset+1);

			tvb_LBRKT = tvb_previous_offset;
			tvb_RBRKT = tvb_previous_offset;

		} while ( tvb_current_offset < tvb_events_end_offset );
	}
}

static void
dissect_megaco_signaldescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *megaco_tree_command_line,  gint tvb_RBRKT, gint tvb_previous_offset)
{

	gint tokenlen, pkg_tokenlen, tvb_current_offset, tvb_next_offset, tvb_help_offset;
	gint tvb_signals_end_offset, tvb_signals_start_offset, tvb_LBRKT;
	/*proto_tree  *megaco_signalsdescriptor_tree, *megaco_signalsdescriptor_ti;*/

	gint requested_signal_start_offset, requested_signal_end_offset;
	proto_tree	*megaco_requestedsignal_tree, *megaco_requestedsignal_ti;

	tokenlen						= 0;
	tvb_current_offset				= 0;
	tvb_next_offset					= 0;
	tvb_help_offset					= 0;
	tvb_signals_end_offset			= 0;
	tvb_signals_start_offset		= 0;
	tvb_LBRKT						= 0;
	requested_signal_start_offset	= 0;
	requested_signal_end_offset		= 0;

	tvb_signals_end_offset   = tvb_RBRKT;
	tvb_signals_start_offset = tvb_previous_offset;

	if(toupper(tvb_get_guint8(tvb, tvb_previous_offset+1))=='G')
	  tokenlen = 2;								/* token is compact text (SG) */
	else
	  tokenlen = 7;								/* token must be verbose text (Signals) */

	tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_previous_offset+tokenlen);

	if(tvb_get_guint8(tvb, tvb_current_offset)!='{') {			/* {} has been omitted */

	  proto_tree_add_text(megaco_tree_command_line, tvb, tvb_signals_start_offset, tokenlen,
				"%s", "Empty Signal Descriptor");

	  if(check_col(pinfo->cinfo, COL_INFO))
	    col_append_str(pinfo->cinfo, COL_INFO, " (Signal:none)");		/* then say so */

	  return;								/* and return */
	}

	tvb_LBRKT = tvb_find_guint8(tvb, tvb_previous_offset, tvb_signals_end_offset, '{');
	tokenlen =  (tvb_LBRKT+1) - tvb_signals_start_offset;

	proto_tree_add_text(megaco_tree_command_line, tvb, tvb_signals_start_offset, tokenlen,
		"%s", tvb_format_text(tvb, tvb_signals_start_offset, tokenlen));

	/*
	megaco_signalsdescriptor_ti = proto_tree_add_item(megaco_tree_command_line,hf_megaco_signal_descriptor,tvb,tvb_previous_offset,tokenlen, FALSE);
	megaco_signalsdescriptor_tree = proto_item_add_subtree(megaco_signalsdescriptor_ti, ett_megaco_signalsdescriptor);
	*/

	tvb_current_offset = tvb_LBRKT;
	tvb_next_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset+1);
	if (check_col(pinfo->cinfo, COL_INFO) )
		col_append_fstr(pinfo->cinfo, COL_INFO, " (Signal:%s)",tvb_format_text(tvb, tvb_current_offset,tokenlen-tvb_current_offset+tvb_previous_offset));


	if ( tvb_current_offset < tvb_signals_end_offset && tvb_current_offset != -1 && tvb_next_offset != tvb_signals_end_offset){


		tvb_RBRKT = tvb_next_offset+1;
		tvb_LBRKT = tvb_next_offset+1;
		tvb_previous_offset = tvb_next_offset;


		do {

			tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1,
				tvb_signals_end_offset, '}');
			tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT,
				tvb_signals_end_offset, '{');

			tvb_current_offset 	= tvb_find_guint8(tvb, tvb_previous_offset,
				tvb_signals_end_offset, ',');

			if (tvb_current_offset == -1 || tvb_current_offset > tvb_signals_end_offset){
				tvb_current_offset = tvb_signals_end_offset;
			}


			/* Descriptor includes no parameters */

			if ( tvb_LBRKT > tvb_current_offset || tvb_LBRKT == -1 ){

				tvb_RBRKT = megaco_tvb_skip_wsp_return(tvb, tvb_current_offset-1)-1;
			}

			/* Descriptor includes Parameters */

			if ( (tvb_current_offset > tvb_LBRKT && tvb_LBRKT != -1)){

				while ( tvb_LBRKT != -1 && tvb_RBRKT > tvb_LBRKT ){

					tvb_LBRKT  = tvb_find_guint8(tvb, tvb_LBRKT+1,
						tvb_signals_end_offset, '{');
					if ( tvb_LBRKT < tvb_RBRKT && tvb_LBRKT != -1)
						tvb_RBRKT  = tvb_find_guint8(tvb, tvb_RBRKT+1,
						tvb_signals_end_offset, '}');
				}

			}

			tvb_help_offset = tvb_LBRKT = tvb_find_guint8(tvb, tvb_previous_offset, tvb_signals_end_offset, '{');

			/* if there are signalparameter  */

			if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){

				requested_signal_start_offset = tvb_help_offset;
				requested_signal_end_offset	 = tvb_RBRKT;
				tvb_help_offset = megaco_tvb_skip_wsp_return(tvb, tvb_help_offset-1);
				pkg_tokenlen = tvb_help_offset - tvb_previous_offset;
				tokenlen = tvb_LBRKT+1 - tvb_previous_offset;
			}
			/* no parameters */
			else {
				tokenlen = pkg_tokenlen = tvb_RBRKT+1 - tvb_previous_offset;
			}

			megaco_requestedsignal_ti = proto_tree_add_text(megaco_tree_command_line, tvb, tvb_previous_offset, tokenlen,
				"%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen));
			megaco_requestedsignal_tree = proto_item_add_subtree(megaco_requestedsignal_ti, ett_megaco_requestedsignal);

			proto_tree_add_item(megaco_requestedsignal_tree,hf_megaco_pkgdname,tvb,tvb_previous_offset,pkg_tokenlen, FALSE);

			if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){
				gchar *msg;

				requested_signal_start_offset = megaco_tvb_skip_wsp(tvb, requested_signal_start_offset +1);
				requested_signal_end_offset = megaco_tvb_skip_wsp_return(tvb, requested_signal_end_offset-1);

				tokenlen = 	requested_signal_end_offset - requested_signal_start_offset;

				msg=tvb_format_text(tvb,requested_signal_start_offset, tokenlen+1);
				if(!strncmp("h245", msg, 4)){
					dissect_megaco_h245(tvb, pinfo, megaco_tree_command_line, requested_signal_start_offset, tokenlen, msg);
				} else {
					proto_tree_add_text(megaco_tree_command_line, tvb, requested_signal_start_offset, tokenlen,
						"%s", msg);
				}
				/* Print the trailing '}' */
				proto_tree_add_text(megaco_tree_command_line, tvb, tvb_RBRKT, 1,
					"%s", tvb_format_text(tvb, tvb_RBRKT, 1));
			}

			tvb_current_offset  = tvb_find_guint8(tvb, tvb_RBRKT,
				tvb_signals_end_offset, ',');

			if (tvb_current_offset == -1 || tvb_current_offset > tvb_signals_end_offset || tvb_current_offset < tvb_previous_offset){
				tvb_current_offset = tvb_signals_end_offset;
			}

			tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset+1);

			tvb_LBRKT = tvb_previous_offset;
			tvb_RBRKT = tvb_previous_offset;
			/* Print the trailing '}' */
			proto_tree_add_text(megaco_tree_command_line, tvb, tvb_signals_end_offset, 1,
				"%s", tvb_format_text(tvb, tvb_signals_end_offset, 1));

		} while ( tvb_current_offset < tvb_signals_end_offset );
	}else{
		/* signals{}*/
		proto_tree_add_text(megaco_tree_command_line, tvb, tvb_signals_end_offset, 1,
				"%s", tvb_format_text(tvb, tvb_signals_end_offset, 1));
	}


}

/*
   auditDescriptor      = AuditToken LBRKT [ auditItem *(COMMA auditItem) ] RBRKT

   auditItem            = ( MuxToken / ModemToken / MediaToken /
                           SignalsToken / EventBufferToken /
                           DigitMapToken / StatsToken / EventsToken /
                           ObservedEventsToken / PackagesToken )                     */
static void
dissect_megaco_auditdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree, packet_info *pinfo _U_,  gint tvb_stop, gint tvb_offset)
{
	gint		tokenlen, tvb_end, tvb_next, token_index;
	proto_tree	*megaco_auditdescriptor_tree, *megaco_auditdescriptor_ti;

	tvb_next  = tvb_find_guint8(tvb, tvb_offset, tvb_stop, '{');           /* find opening LBRKT - is this already checked by caller?*/
	if( tvb_next == -1 )                                                   /* complain and give up if not there */
	{
		proto_tree_add_text(megaco_tree, tvb, tvb_offset, tvb_stop+1-tvb_offset, "Badly constructed audit descriptor (no { )");
		return;
	}
	tokenlen = (tvb_stop + 1) - tvb_offset;

	megaco_auditdescriptor_ti = proto_tree_add_none_format( megaco_tree, hf_megaco_audit_descriptor, 
								tvb, tvb_offset, tokenlen, "Audit descriptor" );

	megaco_auditdescriptor_tree = proto_item_add_subtree( megaco_auditdescriptor_ti, ett_megaco_auditdescriptor );

	tokenlen = tvb_next + 1 - tvb_offset;

	proto_tree_add_text( megaco_auditdescriptor_tree, tvb, tvb_offset, tokenlen, "Audit token {" );

	tvb_offset = tvb_next;

	while( tvb_offset < tvb_stop )
	{
		tvb_offset = megaco_tvb_skip_wsp(tvb, tvb_offset+1);                                          /* find start of an auditItem */
                if( tvb_get_guint8(tvb, tvb_offset) != '}' )                                                  /* got something */
                {
			tvb_next = tvb_find_guint8(tvb, tvb_offset, tvb_stop, ',');                           /* end of an auditItem */
        	        if (tvb_next == -1)  tvb_next = tvb_stop;                                             /* last item doesn't have a comma */
			tvb_end = megaco_tvb_skip_wsp_return(tvb, tvb_next-1);                                /* trim any trailing whitespace */
			tokenlen =  tvb_end - tvb_offset;                                                     /* get length of token */

			token_index = find_megaco_descriptors_names(tvb, tvb_offset, tokenlen);               /* lookup the token */
			if( token_index == -1 )  token_index = 0;                                             /* if not found then 0 => Unknown */

			proto_tree_add_string(megaco_auditdescriptor_tree, hf_megaco_audititem, tvb, 
					tvb_offset, tokenlen, megaco_descriptors_names[token_index].name);    /* and display the long form */

			tvb_offset = tvb_next;                                                                /* advance pointer */
		}
	}
	proto_tree_add_text(megaco_auditdescriptor_tree, tvb, tvb_stop, 1, "}");                              /* End of auditDescriptor */
}

/*
 *    serviceChangeDescriptor = ServicesToken LBRKT serviceChangeParm
 *                          *(COMMA serviceChangeParm) RBRKT
 *
 *    ServicesToken              = ("Services"              / "SV")
 *
 *    serviceChangeParm    = (serviceChangeMethod / serviceChangeReason /
 *                        serviceChangeDelay / serviceChangeAddress /
 *                       serviceChangeProfile / extension / TimeStamp /
 *                        serviceChangeMgcId / serviceChangeVersion )
 *
 */
#define MEGACO_REASON_TOKEN		1
#define MEGACO_DELAY_TOKEN		2
#define MEGACO_SC_ADDR_TOKEN	3
#define MEGACO_MGC_ID_TOKEN		4
#define MEGACO_PROFILE_TOKEN	5
#define MEGACO_VERSION_TOKEN	6
#define MEGACO_METHOD_TOKEN		7

static const megaco_tokens_t megaco_serviceChangeParm_names[] = {
		{ "Unknown-token",	 			NULL }, /* 0 Pad so that the real headers start at index 1 */
		/* streamMode */
		{ "Reason",						"RE" }, /* 1 ReasonToken*/
		{ "Delay",						"DL" }, /* 2 DelayToken */
		{ "ServiceChangeAddress",		"AD" }, /* 3 ServiceChangeAddressToken */
		{ "MgcIdToTry",					"MG" }, /* 4 MgcIdToken */
		{ "Profile",					"PF" }, /* 5 ProfileToken */
		{ "Version",					"V"	 }, /* 6 VersionToken */
		{ "Method",						"MT" }, /* 7  MethodToken */
};

/* Returns index of megaco_tokens_t */
static gint find_megaco_megaco_serviceChangeParm_names(tvbuff_t *tvb, int offset, guint header_len)
{
        guint i;

        for (i = 1; i < array_length(megaco_serviceChangeParm_names); i++) {
                if (header_len == strlen(megaco_serviceChangeParm_names[i].name) &&
                    tvb_strncaseeql(tvb, offset, megaco_serviceChangeParm_names[i].name, header_len) == 0)
                        return i;
                if (megaco_serviceChangeParm_names[i].compact_name != NULL &&
                    header_len == strlen(megaco_serviceChangeParm_names[i].compact_name) &&
                    tvb_strncaseeql(tvb, offset, megaco_serviceChangeParm_names[i].compact_name, header_len) == 0)
                        return i;
        }

        return -1;
}
/*
 * ServiceChangeReasons                                    References
 * --------------------                                    ----------
 */
static const value_string MEGACO_ServiceChangeReasons_vals[] = {
	{900, "Service Restored"},
	{901, "Cold Boot"},
	{902, "Warm Boot"},
	{903, "MGC Directed Change"},
	{904, "Termination malfunctioning"},
	{905, "Termination taken out of service"},
	{906, "Loss of lower layer connectivity (e.g. downstream sync)"},
	{907, "Transmission Failure"},
	{908, "MG Impending Failure"},
	{909, "MGC Impending Failure"},
	{910, "Media Capability Failure"},
	{911, "Modem Capability Failure"},
	{912, "Mux Capability Failure"},
	{913, "Signal Capability Failure"},
	{914, "Event Capability Failure"},
	{915, "State Loss"},
	{916, "Packages Change"},
	{917, "Capabilities Change"},
	{918, "Cancel Graceful"},
	{919, "Warm Failover"},
	{920, "Cold Failover"},
	{  0, NULL }
};

static void
dissect_megaco_servicechangedescriptor(tvbuff_t *tvb, proto_tree *megaco_tree,  gint tvb_RBRKT, gint tvb_previous_offset)
{

	gint 		tokenlen, tvb_LBRKT, tvb_offset;
	gint		token_index;
	gint		tvb_current_offset;
	gboolean	more_params = TRUE;
	proto_item* item;
	gint				reason;
	guint8				ServiceChangeReason_str[4];

	tvb_LBRKT  = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{');
	/*
	if (tvb_LBRKT == -1)
		return;
		*/
	tokenlen = (tvb_LBRKT + 1) - tvb_previous_offset;
	proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tokenlen,
				"%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen));


	/* Start dissecting serviceChangeParm */
	tvb_previous_offset = tvb_LBRKT + 1;
	while (more_params){
		tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_previous_offset);
		/* Find token length */
		for (tvb_offset=tvb_previous_offset; tvb_offset < tvb_RBRKT; tvb_offset++){
			if (!isalpha(tvb_get_guint8(tvb, tvb_offset ))){
				break;
			}
		}
		tokenlen = tvb_offset - tvb_previous_offset;
		token_index = find_megaco_megaco_serviceChangeParm_names(tvb, tvb_previous_offset, tokenlen);

		tvb_offset  = tvb_find_guint8(tvb, tvb_offset, tvb_RBRKT, ',');
		if ((tvb_offset == -1)||(tvb_offset >=tvb_RBRKT)){
			more_params = FALSE;
			tvb_offset = megaco_tvb_skip_wsp_return(tvb, tvb_RBRKT-1);
		}
		tokenlen = tvb_offset - tvb_previous_offset;
		if (more_params == TRUE )
			/* Include ',' */
			tokenlen++;
		switch(token_index){
		case MEGACO_REASON_TOKEN:
			/* ReasonToken  EQUAL VALUE
			 * VALUE                = quotedString / 1*(SafeChar)
			 */
			item = proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tokenlen,
				"%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen));

			/* As the reason code ( if a digit ) can be in quoted string or 'just' digit
			 * look for a nine and hope for the best.
			 */
			tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '9');
			if ( tvb_current_offset == -1)
				break;

			tvb_get_nstringz0(tvb,tvb_current_offset,4,ServiceChangeReason_str);
			reason = atoi(ServiceChangeReason_str);

			proto_item_append_text(item,"[ %s ]", val_to_str(reason, MEGACO_ServiceChangeReasons_vals,"Unknown (%u)"));
			break;
		case MEGACO_DELAY_TOKEN:
		case MEGACO_SC_ADDR_TOKEN:
		case MEGACO_MGC_ID_TOKEN:
		case MEGACO_PROFILE_TOKEN:
		case MEGACO_VERSION_TOKEN:
		case MEGACO_METHOD_TOKEN:
			/* No special dissection: fall trough */
		default:
		/* Unknown or:
		 * extension            = extensionParameter parmValue
		 * extensionParameter   = "X"  ("-" / "+") 1*6(ALPHA / DIGIT)
		 */
			proto_tree_add_text(megaco_tree, tvb, tvb_previous_offset, tokenlen,
				"%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen));
			break;
		}

		tvb_previous_offset = tvb_offset +1;

	}/*End while */

	/* extension            = extensionParameter parmValue
	 * extensionParameter   = "X"  ("-" / "+") 1*6(ALPHA / DIGIT)
	 */

	 /*
	tokenlen =  (tvb_RBRKT+1) - tvb_previous_offset;
	proto_tree_add_string(megaco_tree_command_line, hf_megaco_servicechange_descriptor, tvb,
					 		tvb_previous_offset, tokenlen,
							tvb_format_text(tvb, tvb_previous_offset,
							tokenlen));
	*/
	proto_tree_add_text(megaco_tree, tvb, tvb_RBRKT, 1,"%s", tvb_format_text(tvb, tvb_RBRKT, 1));

}
static void
dissect_megaco_digitmapdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line,  gint tvb_RBRKT, gint tvb_previous_offset)
{

	gint 	tokenlen;

	tokenlen = 0;

	tokenlen =  tvb_RBRKT - tvb_previous_offset;
	proto_tree_add_string(megaco_tree_command_line, hf_megaco_digitmap_descriptor, tvb,
					 		tvb_previous_offset, tokenlen,
							tvb_format_text(tvb, tvb_previous_offset,
							tokenlen));

}
static void
dissect_megaco_statisticsdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line,  gint tvb_RBRKT, gint tvb_previous_offset)
{

	gint 	tokenlen;

	tokenlen = 0;

	tokenlen =  (tvb_RBRKT+1) - tvb_previous_offset;
	proto_tree_add_string(megaco_tree_command_line, hf_megaco_statistics_descriptor, tvb,
					 		tvb_previous_offset, tokenlen,
							tvb_format_text(tvb, tvb_previous_offset,
							tokenlen));

}
static void
dissect_megaco_observedeventsdescriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *megaco_tree_command_line,  gint tvb_RBRKT, gint tvb_previous_offset)
{

	gint tokenlen, pkg_tokenlen, tvb_current_offset, tvb_next_offset, tvb_help_offset;
	gint tvb_observedevents_end_offset, tvb_observedevents_start_offset, tvb_LBRKT;
	proto_tree  *megaco_observedeventsdescriptor_tree, *megaco_observedeventsdescriptor_ti;

	guint8 tempchar;
	gint requested_event_start_offset, requested_event_end_offset, param_start_offset, param_end_offset;
	proto_tree	*megaco_observedevent_tree, *megaco_observedevent_ti;

	tokenlen						= 0;
	tvb_current_offset				= 0;
	tvb_next_offset					= 0;
	tvb_help_offset					= 0;
	tvb_observedevents_end_offset	= 0;
	tvb_observedevents_start_offset	= 0;
	tvb_LBRKT						= 0;
	requested_event_start_offset	= 0;
	requested_event_end_offset	= 0;


	tvb_LBRKT = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{');
	tvb_next_offset = tvb_LBRKT;
	tokenlen =  (tvb_next_offset+1) - tvb_previous_offset;

	/*
	megaco_observedeventsdescriptor_ti = proto_tree_add_item(megaco_tree_command_line,hf_megaco_observedevents_descriptor,tvb,tvb_previous_offset,tokenlen, FALSE);
	megaco_observedeventsdescriptor_tree = proto_item_add_subtree(megaco_observedeventsdescriptor_ti, ett_megaco_observedeventsdescriptor);
	*/

	megaco_observedeventsdescriptor_ti = proto_tree_add_text(megaco_tree_command_line, tvb, tvb_previous_offset, tokenlen,
		"%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen));
	megaco_observedeventsdescriptor_tree = proto_item_add_subtree(megaco_observedeventsdescriptor_ti, ett_megaco_observedeventsdescriptor);

	tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '=');
	tvb_next_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{');

	if ( tvb_current_offset < tvb_RBRKT && tvb_current_offset != -1 ){

		tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset +1);
		tvb_help_offset = megaco_tvb_skip_wsp_return(tvb, tvb_next_offset-1);

		tokenlen =  tvb_help_offset - tvb_current_offset;

		proto_tree_add_string(megaco_observedeventsdescriptor_tree, hf_megaco_requestid, tvb,
			tvb_current_offset, tokenlen,
			tvb_format_text(tvb, tvb_current_offset,
			tokenlen));

		tvb_observedevents_end_offset   = tvb_RBRKT;
		tvb_observedevents_start_offset = tvb_previous_offset;

		tvb_RBRKT = tvb_next_offset+1;
		tvb_LBRKT = tvb_next_offset+1;
		tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_next_offset+1);


		do {

			tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1,
				tvb_observedevents_end_offset, '}');
			tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT,
				tvb_observedevents_end_offset, '{');

			tvb_current_offset 	= tvb_find_guint8(tvb, tvb_previous_offset,
				tvb_observedevents_end_offset, ',');

			if (tvb_current_offset == -1 || tvb_current_offset > tvb_observedevents_end_offset){
				tvb_current_offset = tvb_observedevents_end_offset;
			}


			/* Descriptor includes no parameters */

			if ( tvb_LBRKT > tvb_current_offset || tvb_LBRKT == -1 ){

				tvb_RBRKT = megaco_tvb_skip_wsp_return(tvb, tvb_current_offset-1)-1;
			}

			/* Descriptor includes Parameters */

			if ( (tvb_current_offset > tvb_LBRKT && tvb_LBRKT != -1)){

				while ( tvb_LBRKT != -1 && tvb_RBRKT > tvb_LBRKT ){

					tvb_LBRKT  = tvb_find_guint8(tvb, tvb_LBRKT+1,
						tvb_observedevents_end_offset, '{');
					if ( tvb_LBRKT < tvb_RBRKT && tvb_LBRKT != -1){
						tvb_RBRKT  = tvb_find_guint8(tvb, tvb_RBRKT+1,
							tvb_observedevents_end_offset, '}');
					}
				}

			}

			tvb_LBRKT = tvb_help_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_observedevents_end_offset, '{');

			/* if there are eventparameter  */

			if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){

				requested_event_start_offset = tvb_help_offset;
				requested_event_end_offset	 = tvb_RBRKT;
				tvb_help_offset = megaco_tvb_skip_wsp_return(tvb, tvb_help_offset-1);
				pkg_tokenlen = tvb_help_offset - tvb_previous_offset;
				tokenlen = tvb_LBRKT+1 - tvb_previous_offset;
			}
			/* no parameters */
			else {
				tokenlen = pkg_tokenlen = tvb_RBRKT+1 - tvb_previous_offset;
			}

			megaco_observedevent_ti = proto_tree_add_text(megaco_tree_command_line, tvb, tvb_previous_offset, tokenlen,
				"%s", tvb_format_text(tvb, tvb_previous_offset, tokenlen));

			megaco_observedevent_tree = proto_item_add_subtree(megaco_observedevent_ti, ett_megaco_observedevent);

			proto_tree_add_item(megaco_observedevent_tree,hf_megaco_pkgdname,tvb,tvb_previous_offset,pkg_tokenlen, FALSE);

			if ( tvb_help_offset < tvb_RBRKT && tvb_help_offset != -1 ){

				tvb_help_offset = megaco_tvb_skip_wsp(tvb, requested_event_start_offset +1);
				tempchar = tvb_get_guint8(tvb, tvb_help_offset);
				if ( (tempchar >= 'a')&& (tempchar <= 'z'))
					tempchar = tempchar - 0x20;

				requested_event_start_offset = megaco_tvb_skip_wsp(tvb, requested_event_start_offset +1)-1;
				requested_event_end_offset = megaco_tvb_skip_wsp_return(tvb, requested_event_end_offset-1);

				tvb_help_offset = requested_event_start_offset;

				do {
					gchar *msg;

					param_start_offset = megaco_tvb_skip_wsp(tvb, tvb_help_offset+1);

					tvb_help_offset = tvb_find_guint8(tvb, tvb_help_offset+1,requested_event_end_offset, ',');

					if ( tvb_help_offset > requested_event_end_offset || tvb_help_offset == -1){
						tvb_help_offset = requested_event_end_offset;
					}

					param_end_offset = megaco_tvb_skip_wsp(tvb, tvb_help_offset-1);

					tokenlen = 	param_end_offset - param_start_offset+1;
					msg=tvb_format_text(tvb,param_start_offset, tokenlen);
					if(!strncmp("h245", msg, 4)){
						dissect_megaco_h245(tvb, pinfo, megaco_tree_command_line, param_start_offset, tokenlen, msg);
					} else {
						proto_tree_add_text(megaco_tree_command_line, tvb, param_start_offset, tokenlen,
							"%s", msg);
					}


				} while ( tvb_help_offset < requested_event_end_offset );
			}

			tvb_previous_offset = tvb_current_offset;
			tvb_current_offset  = tvb_find_guint8(tvb, tvb_RBRKT,
				tvb_observedevents_end_offset, ',');

			if (tvb_current_offset == -1 || tvb_current_offset > tvb_observedevents_end_offset ){
				tvb_current_offset = tvb_observedevents_end_offset;
			}
			if (tvb_current_offset < tvb_previous_offset) {
				proto_tree_add_text(megaco_observedevent_tree, tvb, 0, 0, "[ Parse error: Invalid offset ]");
				return;
			}

			tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset+1);

			tvb_LBRKT = tvb_previous_offset;
			tvb_RBRKT = tvb_previous_offset;
			/* Print the trailing '}' */
			proto_tree_add_text(megaco_tree_command_line, tvb, tvb_observedevents_end_offset, 1,
				"%s", tvb_format_text(tvb, tvb_observedevents_end_offset, 1));

		} while ( tvb_current_offset < tvb_observedevents_end_offset );
	}
}
static void
dissect_megaco_topologydescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line,  gint tvb_RBRKT, gint tvb_previous_offset)
{

	gint 	tokenlen;

	tokenlen = 0;

	tokenlen =  (tvb_RBRKT+1) - tvb_previous_offset;
	proto_tree_add_string(megaco_tree_command_line, hf_megaco_topology_descriptor, tvb,
					 		tvb_previous_offset, tokenlen,
							tvb_format_text_wsp(tvb, tvb_previous_offset,
							tokenlen));

}
static void
dissect_megaco_Packagesdescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line,  gint tvb_RBRKT, gint tvb_previous_offset)
{

	gint tokenlen, tvb_current_offset, tvb_next_offset, tvb_help_offset;
	gint tvb_packages_end_offset, tvb_packages_start_offset, tvb_LBRKT;
	proto_tree  *megaco_packagesdescriptor_tree, *megaco_packagesdescriptor_ti;

	tokenlen					= 0;
	tvb_current_offset			= 0;
	tvb_next_offset				= 0;
	tvb_help_offset				= 0;
	tvb_packages_end_offset		= 0;
	tvb_packages_start_offset	= 0;
	tvb_LBRKT					= 0;

	tokenlen =  (tvb_RBRKT+1) - tvb_previous_offset;

	megaco_packagesdescriptor_ti = proto_tree_add_item(megaco_tree_command_line,hf_megaco_packages_descriptor,tvb,tvb_previous_offset,tokenlen, FALSE);
	megaco_packagesdescriptor_tree = proto_item_add_subtree(megaco_packagesdescriptor_ti, ett_megaco_packagesdescriptor);



	tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '=');
	tvb_next_offset = tvb_find_guint8(tvb, tvb_previous_offset, tvb_RBRKT, '{');

	if ( tvb_current_offset < tvb_RBRKT && tvb_current_offset != -1 ){

		tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset +1);
		tvb_help_offset = megaco_tvb_skip_wsp_return(tvb, tvb_next_offset-1);

		tokenlen =  tvb_help_offset - tvb_current_offset;

		proto_tree_add_string(megaco_packagesdescriptor_tree, hf_megaco_requestid, tvb,
			tvb_current_offset, tokenlen,
			tvb_format_text(tvb, tvb_current_offset,
			tokenlen));

		tvb_packages_end_offset   = tvb_RBRKT;
		tvb_packages_start_offset = tvb_previous_offset;

		tvb_RBRKT = tvb_next_offset+1;
		tvb_LBRKT = tvb_next_offset+1;
		tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_next_offset+1);


		do {

			tvb_RBRKT = tvb_find_guint8(tvb, tvb_RBRKT+1,
				tvb_packages_end_offset, '}');
			tvb_LBRKT = tvb_find_guint8(tvb, tvb_LBRKT,
				tvb_packages_end_offset, '{');

			tvb_current_offset 	= tvb_find_guint8(tvb, tvb_previous_offset,
				tvb_packages_end_offset, ',');

			if (tvb_current_offset == -1 || tvb_current_offset > tvb_packages_end_offset){
				tvb_current_offset = tvb_packages_end_offset;
			}


			/* Descriptor includes no parameters */

			if ( tvb_LBRKT > tvb_current_offset || tvb_LBRKT == -1 ){

				tvb_RBRKT = megaco_tvb_skip_wsp_return(tvb, tvb_current_offset-1)-1;
			}

			/* Descriptor includes Parameters */

			if ( (tvb_current_offset > tvb_LBRKT && tvb_LBRKT != -1)){

				while ( tvb_LBRKT != -1 && tvb_RBRKT > tvb_LBRKT ){

					tvb_LBRKT  = tvb_find_guint8(tvb, tvb_LBRKT+1,
						tvb_packages_end_offset, '{');
					if ( tvb_LBRKT < tvb_RBRKT && tvb_LBRKT != -1)
						tvb_RBRKT  = tvb_find_guint8(tvb, tvb_RBRKT+1,
						tvb_packages_end_offset, '}');
				}

			}

			tokenlen = tvb_RBRKT+1 - tvb_previous_offset;

			proto_tree_add_text(megaco_packagesdescriptor_tree, tvb, tvb_previous_offset, tokenlen,
				"%s", tvb_format_text(tvb,tvb_previous_offset,
				tokenlen));


			tvb_current_offset  	= tvb_find_guint8(tvb, tvb_RBRKT,
				tvb_packages_end_offset, ',');

			if (tvb_current_offset == -1 || tvb_current_offset > tvb_packages_end_offset ){
				tvb_current_offset = tvb_packages_end_offset;
			}

			tvb_previous_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset+1);

			tvb_LBRKT = tvb_previous_offset;
			tvb_RBRKT = tvb_previous_offset;

		} while ( tvb_current_offset < tvb_packages_end_offset );
	}

}
/* The list of error code values is fetched from http://www.iana.org/assignments/megaco-h248 	*/
/* 2003-08-28											*/

static const value_string MEGACO_error_code_vals[] = {

	{400, "Syntax error in message"},
	{401, "Protocol Error"},
	{402, "Unauthorized"},
	{403, "Syntax error in transaction request"},
	{406, "Version Not Supported"},
	{410, "Incorrect identifier"},
	{411, "The transaction refers to an unknown ContextId"},
	{412, "No ContextIDs available"},
	{421, "Unknown action or illegal combination of actions"},
	{422, "Syntax Error in Action"},
	{430, "Unknown TerminationID"},
	{431, "No TerminationID matched a wildcard"},
	{432, "Out of TerminationIDs or No TerminationID available"},
	{433, "TerminationID is already in a Context"},
	{434, "Max number of Terminations in a Context exceeded"},
	{435, "Termination ID is not in specified Context"},
	{440, "Unsupported or unknown Package"},
	{441, "Missing Remote or Local Descriptor"},
	{442, "Syntax Error in Command"},
	{443, "Unsupported or Unknown Command"},
	{444, "Unsupported or Unknown Descriptor"},
	{445, "Unsupported or Unknown Property"},
	{446, "Unsupported or Unknown Parameter"},
	{447, "Descriptor not legal in this command"},
	{448, "Descriptor appears twice in a command"},
	{450, "No such property in this package"},
	{451, "No such event in this package"},
	{452, "No such signal in this package"},
	{453, "No such statistic in this package"},
	{454, "No such parameter value in this package"},
	{455, "Property illegal in this Descriptor"},
	{456, "Property appears twice in this Descriptor"},
	{457, "Missing parameter in signal or event"},
	{458, "Unexpected Event/Request ID"},
	{459, "Unsupported or Unknown Profile"},
	{471, "Implied Add for Multiplex failure"},

	{500, "Internal software Failure in MG"},
	{501, "Not Implemented"},
	{502, "Not ready."},
	{503, "Service Unavailable"},
	{504, "Command Received from unauthorized entity"},
	{505, "Transaction Request Received before a Service Change Reply has been received"},
	{506, "Number of Transaction Pendings Exceeded"},
	{510, "Insufficient resources"},
	{512, "Media Gateway unequipped to detect requested Event"},
	{513, "Media Gateway unequipped to generate requested Signals"},
	{514, "Media Gateway cannot send the specified announcement"},
	{515, "Unsupported Media Type"},
	{517, "Unsupported or invalid mode"},
	{518, "Event buffer full"},
	{519, "Out of space to store digit map"},
	{520, "Digit Map undefined in the MG"},
	{521, "Termination is ServiceChanging"},
	{526, "Insufficient bandwidth"},
	{529, "Internal hardware failure in MG"},
	{530, "Temporary Network failure"},
	{531, "Permanent Network failure"},
	{532, "Audited Property, Statistic, Event or Signal does not exist"},
	{533, "Response exceeds maximum transport PDU size"},
	{534, "Illegal write or read only property"},
	{540, "Unexpected initial hook state"},
	{581, "Does Not Exist"},

	{600, "Illegal syntax within an announcement specification"},
	{601, "Variable type not supported"},
	{602, "Variable value out of range"},
	{603, "Category not supported"},
	{604, "Selector type not supported"},
	{605, "Selector value not supported"},
	{606, "Unknown segment ID"},
	{607, "Mismatch between play specification and provisioned data"},
	{608, "Provisioning error"},
	{609, "Invalid offset"},
	{610, "No free segment IDs"},
	{611, "Temporary segment not found"},
	{612, "Segment in use"},
	{613, "ISP port limit overrun"},
	{614, "No modems available"},
	{615, "Calling number unacceptable"},
	{616, "Called number unacceptable"},
	{  0, NULL }
};



static void
dissect_megaco_errordescriptor(tvbuff_t *tvb, proto_tree *megaco_tree_command_line,  gint tvb_RBRKT, gint tvb_previous_offset)
{

	gint 				tokenlen;
	gint				error_code;
	guint8				error[4];
	gint 				tvb_next_offset, tvb_current_offset,tvb_len;
	proto_item*			item;
	proto_item*			hidden_item;

	tvb_len				= tvb_length(tvb);
	tokenlen			= 0;
	tvb_next_offset			= 0;
	tvb_current_offset		= 0;
	tvb_len				= 0;

	tvb_current_offset = tvb_find_guint8(tvb, tvb_previous_offset , tvb_RBRKT, '=');
	tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_current_offset +1);
	tvb_get_nstringz0(tvb,tvb_current_offset,4,error);
	error_code = atoi(error);
	hidden_item = proto_tree_add_string(megaco_tree_command_line, hf_megaco_error_descriptor, tvb,
					 		tvb_current_offset, 3,
							tvb_format_text(tvb, tvb_current_offset,
							3));
	PROTO_ITEM_SET_HIDDEN(hidden_item);

	tokenlen =  (tvb_RBRKT) - tvb_previous_offset+1;


	proto_tree_add_string(megaco_tree_command_line, hf_megaco_error_descriptor, tvb,
					 		tvb_previous_offset, tokenlen,
							tvb_format_text(tvb, tvb_previous_offset,
							tokenlen));

	item = proto_tree_add_text(megaco_tree_command_line, tvb, tvb_current_offset, 3,
	    "Error code: %s",
	    val_to_str(error_code, MEGACO_error_code_vals,
	      "Unknown (%u)"));

	PROTO_ITEM_SET_GENERATED(item);

}
static void
dissect_megaco_TerminationStatedescriptor(tvbuff_t *tvb, proto_tree *megaco_mediadescriptor_tree,  gint tvb_next_offset, gint tvb_current_offset)
{
	gint tokenlen;
	gint tvb_offset;
	guint8 tempchar;

	proto_tree  *megaco_TerminationState_tree, *megaco_TerminationState_ti;

	tokenlen		= 0;
	tvb_offset		= 0;

	tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_next_offset, '=');

	tokenlen = tvb_next_offset - tvb_current_offset;
	/*
	megaco_TerminationState_ti = proto_tree_add_item(megaco_mediadescriptor_tree,hf_megaco_TerminationState_descriptor,tvb,tvb_current_offset,tokenlen, FALSE);
	megaco_TerminationState_tree = proto_item_add_subtree(megaco_TerminationState_ti, ett_megaco_TerminationState);
	*/
	megaco_TerminationState_ti = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_current_offset, tokenlen,
									"%s", tvb_format_text(tvb, tvb_current_offset, tokenlen));
	megaco_TerminationState_tree = proto_item_add_subtree(megaco_TerminationState_ti, ett_megaco_TerminationState);

	while ( tvb_offset < tvb_next_offset && tvb_offset != -1 ){

		tempchar = tvb_get_guint8(tvb, tvb_current_offset);
		tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
		if ( (tempchar >= 'a')&& (tempchar <= 'z'))
			tempchar = tempchar - 0x20;

		switch ( tempchar ){

		case 'S':
			tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_offset, ',');
			if ( tvb_offset == -1 || tvb_offset > tvb_next_offset ){
				tvb_offset = tvb_next_offset;
			}

			tempchar = tvb_get_guint8(tvb, tvb_current_offset);
			tokenlen = tvb_offset - tvb_current_offset;
			if ( (tempchar >= 'a')&& (tempchar <= 'z'))
				tempchar = tempchar - 0x20;

			proto_tree_add_string(megaco_TerminationState_tree, hf_megaco_Service_State, tvb,
				tvb_current_offset, tokenlen,
				tvb_format_text(tvb, tvb_current_offset,
				tokenlen));

			break;

		case 'B':

			tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_offset, ',');
			if ( tvb_offset == -1 || tvb_offset > tvb_next_offset ){
				tvb_offset = tvb_next_offset;
			}

			tempchar = tvb_get_guint8(tvb, tvb_current_offset);
			tokenlen = tvb_offset - tvb_current_offset;
			if ( (tempchar >= 'a')&& (tempchar <= 'z'))
				tempchar = tempchar - 0x20;

			proto_tree_add_string(megaco_TerminationState_tree, hf_megaco_Event_Buffer_Control, tvb,
				tvb_current_offset, tokenlen,
				tvb_format_text(tvb, tvb_current_offset,
				tokenlen));

			break;

		case 'E':
			tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_offset, ',');
			if ( tvb_offset == -1 || tvb_offset > tvb_next_offset ){
				tvb_offset = tvb_next_offset;
			}

			tempchar = tvb_get_guint8(tvb, tvb_current_offset);
			tokenlen = tvb_offset - tvb_current_offset;
			if ( (tempchar >= 'a')&& (tempchar <= 'z'))
				tempchar = tempchar - 0x20;

			proto_tree_add_string(megaco_TerminationState_tree, hf_megaco_Event_Buffer_Control, tvb,
				tvb_current_offset, tokenlen,
				tvb_format_text(tvb, tvb_current_offset,
				tokenlen));

			break;

		default:
			tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_offset, ',');
			if ( tvb_offset == -1 || tvb_offset > tvb_next_offset ){
				tvb_offset = tvb_next_offset;
			}

			tokenlen = tvb_offset - tvb_current_offset;

			proto_tree_add_text(megaco_TerminationState_tree, tvb, tvb_current_offset, tokenlen,
				"%s", tvb_format_text(tvb,tvb_current_offset,tokenlen));
			break;
		}


		tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
		tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_next_offset, '=');

	}
	proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_next_offset, 1,
			"%s", tvb_format_text(tvb, tvb_next_offset, 1));

}

static void
dissect_megaco_Localdescriptor(tvbuff_t *tvb, proto_tree *megaco_mediadescriptor_tree,packet_info *pinfo, gint tvb_next_offset, gint tvb_current_offset)
{
	gint tokenlen;
	tvbuff_t *next_tvb;

	proto_tree  *megaco_localdescriptor_tree, *megaco_localdescriptor_ti;

	tokenlen = 0;

	tokenlen = tvb_next_offset - tvb_current_offset;


	/*
	megaco_localdescriptor_ti = proto_tree_add_item(megaco_mediadescriptor_tree,hf_megaco_Local_descriptor,tvb,tvb_current_offset,tokenlen, FALSE);
	*/
	megaco_localdescriptor_ti = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_current_offset, tokenlen,
		"%s", tvb_format_text(tvb, tvb_current_offset, tokenlen));
	megaco_localdescriptor_tree = proto_item_add_subtree(megaco_localdescriptor_ti, ett_megaco_Localdescriptor);

	tokenlen = tvb_next_offset - tvb_current_offset;
	if ( tokenlen > 3 ){
		next_tvb = tvb_new_subset(tvb, tvb_current_offset, tokenlen, tokenlen);
		call_dissector(sdp_handle, next_tvb, pinfo, megaco_localdescriptor_tree);
	}
}

/*
 *   localControlDescriptor = LocalControlToken LBRKT localParm
 *                          *(COMMA localParm) RBRKT
 *   ; at-most-once per item
 *   localParm            = ( streamMode / propertyParm / reservedValueMode / reservedGroupMode )
 */

#define MEGACO_MODETOKEN			1
#define MEGACO_RESERVEDVALUETOKEN	2
#define MEGACO_RESERVEDGROUPTOKEN	3
#define MEGACO_H324_H223CAPR		4
#define MEGACO_H324_MUXTBL_IN		5
#define MEGACO_H324_MUXTBL_OUT		6
#define MEGACO_DS_DSCP				7
#define MEGACO_GM_SAF				8
#define MEGACO_GM_SAM				9
#define MEGACO_GM_SPF				10
#define MEGACO_GM_SPR				11
#define MEGACO_GM_ESAS				12
#define MEGACO_GM_LSA				13
#define MEGACO_GM_ESPS				14
#define MEGACO_GM_LSP				15
#define MEGACO_GM_RSB				16

static const megaco_tokens_t megaco_localParam_names[] = {
		{ "Unknown-token",	 			NULL }, /* 0 Pad so that the real headers start at index 1 */
		/* streamMode */
		{ "Mode",						"MO" }, /* 1 */
		{ "ReservedValue",				"RV" }, /* 2 */
		{ "ReservedGroup",				"RG" }, /* 3 */
		/* propertyParm         = pkgdName parmValue
		 * Add more package names as needed.
		 */
		{ "h324/h223capr",				NULL }, /* 4 */
		{ "h324/muxtbl_in",				NULL },	/* 5 */
		{ "h324/muxtbl_out",			NULL },	/* 6 */
		{ "ds/dscp",					NULL },	/* 7 */
		{ "gm/saf",						NULL },	/* 8 */
		{ "gm/sam",						NULL },	/* 9 */
		{ "gm/spf",						NULL },	/* 10 */
		{ "gm/spr",						NULL },	/* 11 */
		{ "gm/esas",					NULL },	/* 12 */
		{ "gm/lsa",						NULL },	/* 13 */
		{ "gm/esps",					NULL },	/* 14 */
		{ "gm/lsp",						NULL },	/* 15 */
		{ "gm/rsb",						NULL },	/* 16 */
};

/* Returns index of megaco_tokens_t */
static gint find_megaco_localParam_names(tvbuff_t *tvb, int offset, guint header_len)
{
        guint i;

        for (i = 1; i < array_length(megaco_localParam_names); i++) {
                if (header_len == strlen(megaco_localParam_names[i].name) &&
                    tvb_strncaseeql(tvb, offset, megaco_localParam_names[i].name, header_len) == 0)
                        return i;
                if (megaco_localParam_names[i].compact_name != NULL &&
                    header_len == strlen(megaco_localParam_names[i].compact_name) &&
                    tvb_strncaseeql(tvb, offset, megaco_localParam_names[i].compact_name, header_len) == 0)
                        return i;
        }

        return -1;
}

static void
dissect_megaco_LocalControldescriptor(tvbuff_t *tvb, proto_tree *megaco_mediadescriptor_tree, packet_info *pinfo,  gint tvb_next_offset, gint tvb_current_offset)
{
	gint tokenlen;
	guint token_name_len;
	gint tvb_offset,tvb_help_offset;
	gint token_index = 0;
	gchar *msg;
	proto_item* item;
	guint8				code_str[3];

	/*proto_tree  *megaco_LocalControl_tree, *megaco_LocalControl_ti; */

	tokenlen		= 0;
	tvb_offset		= 0;
	tvb_help_offset = 0;


	tokenlen = tvb_next_offset - tvb_current_offset;
	/*
	megaco_LocalControl_ti = proto_tree_add_item(megaco_mediadescriptor_tree,hf_megaco_LocalControl_descriptor,tvb,tvb_current_offset,tokenlen, FALSE);
	megaco_LocalControl_tree = proto_item_add_subtree(megaco_LocalControl_ti, ett_megaco_LocalControldescriptor);
	*/
	while ( tvb_offset < tvb_next_offset && tvb_offset != -1 ){

		tvb_help_offset	= tvb_current_offset;

		/*
		 * Find local parameter name
		 * localParm            = ( streamMode / propertyParm / reservedValueMode / reservedGroupMode )
		 * pkgdName             = (PackageName SLASH ItemID) ;specific item
		 *                    / (PackageName SLASH "*") ;all events in package
		 *                    / ("*" SLASH "*") ; all events supported by the MG
		 */
		/* Find token length */
		for (tvb_offset=tvb_current_offset; tvb_offset < tvb_next_offset; tvb_offset++){
			guint8 octet;
			octet = tvb_get_guint8(tvb, tvb_offset);
			if (!isalnum(octet)){
				if ((octet!='/')&&(octet!='_')){
					break;
				}
			}
		}
		token_name_len = tvb_offset - tvb_current_offset;
		/* Debug Code
		proto_tree_add_text(megaco_LocalControl_tree, tvb, tvb_current_offset, token_name_len,
				"%s", tvb_format_text(tvb,tvb_current_offset,token_name_len));

		 */
		token_index = find_megaco_localParam_names(tvb, tvb_current_offset, token_name_len);
		/* Find start of parameter value */
		tvb_offset = tvb_find_guint8(tvb, tvb_offset , tvb_next_offset, '=');
		if (tvb_offset == -1)
			THROW(ReportedBoundsError);
		/* Start search after '=' in case there is no SP*/
		tvb_offset++;
		tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset);

		/* find if there are more parameters or not */
		tvb_offset = tvb_find_guint8(tvb, tvb_current_offset , tvb_offset, ',');
		if ( tvb_offset < 0 || tvb_offset > tvb_next_offset ){
			tvb_offset = tvb_next_offset;
		}

		tokenlen = megaco_tvb_skip_wsp_return(tvb,tvb_offset-1) - tvb_current_offset;
		/* Debug Code
		proto_tree_add_text(megaco_LocalControl_tree, tvb, tvb_current_offset, tokenlen,
				"%s", tvb_format_text(tvb,tvb_current_offset,tokenlen));

		 */
		switch ( token_index ){

		case MEGACO_MODETOKEN: /* Mode */
			proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_mode, tvb,
				tvb_current_offset, tokenlen,
				tvb_format_text(tvb, tvb_current_offset,
				tokenlen));
			if (check_col(pinfo->cinfo, COL_INFO) )
				col_append_fstr(pinfo->cinfo, COL_INFO, " (Mode:%s)",tvb_format_text(tvb, tvb_current_offset,tokenlen));
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
			break;

		case MEGACO_RESERVEDVALUETOKEN: /* ReservedValue */
			proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_reserve_value, tvb,
					tvb_current_offset, tokenlen,
					tvb_format_text(tvb, tvb_current_offset,
					tokenlen));

			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
			break;
		case MEGACO_RESERVEDGROUPTOKEN: /* ReservedGroup */
			proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_reserve_group, tvb,
				tvb_current_offset, tokenlen,
				tvb_format_text(tvb, tvb_current_offset,
				tokenlen));
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
			break;

		case MEGACO_H324_H223CAPR: /* h324/h223capr */
			proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_h324_h223capr, tvb,
				tvb_current_offset, tokenlen,
				tvb_format_text(tvb, tvb_current_offset,
				tokenlen));

			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
			tokenlen = tvb_offset - tvb_help_offset;
			msg=tvb_format_text(tvb,tvb_help_offset, tokenlen);
			dissect_megaco_h324_h223caprn(tvb, pinfo, megaco_mediadescriptor_tree, tvb_help_offset, tokenlen, msg);

			break;

		case MEGACO_H324_MUXTBL_IN: /* h324/muxtbl_in */

			proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_h324_muxtbl_in, tvb,
				tvb_current_offset, tokenlen,
				tvb_format_text(tvb, tvb_current_offset,
				tokenlen));

			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);

			tokenlen = tvb_offset - tvb_help_offset;
			msg=tvb_format_text(tvb,tvb_help_offset, tokenlen);
			/* Call the existing rotine with tree = NULL to avoid an entry to the tree */
			dissect_megaco_h245(tvb, pinfo, NULL, tvb_help_offset, tokenlen, msg);

			break;

		case MEGACO_H324_MUXTBL_OUT:

			proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_h324_muxtbl_out, tvb,
				tvb_current_offset, tokenlen,
				tvb_format_text(tvb, tvb_current_offset,
				tokenlen));

			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);

			tokenlen = tvb_offset - tvb_help_offset;
			msg=tvb_format_text(tvb,tvb_help_offset, tokenlen);
			/* Call the existing rotine with tree = NULL to avoid an entry to the tree */
			dissect_megaco_h245(tvb, pinfo, NULL, tvb_help_offset, tokenlen, msg);

			break;

		case MEGACO_DS_DSCP:
			item = proto_tree_add_string(megaco_mediadescriptor_tree, hf_megaco_ds_dscp, tvb,
				tvb_current_offset, tokenlen,
				tvb_format_text(tvb, tvb_current_offset,
				tokenlen));

			tvb_get_nstringz0(tvb,tvb_current_offset,3,code_str);
			proto_item_append_text(item,"[ %s ]", val_to_str(strtoul(code_str,NULL,16), dscp_vals,"Unknown (%u)"));

			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
			break;

		case MEGACO_GM_SAF:
			tokenlen = tvb_offset - tvb_help_offset;
			item = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen,
				"%s", tvb_format_text(tvb,tvb_help_offset,
				tokenlen));
			proto_item_append_text(item," [Remote Source Address Filtering]");
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
			break;
		case MEGACO_GM_SAM:
			tokenlen = tvb_offset - tvb_help_offset;
			item = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen,
				"%s", tvb_format_text(tvb,tvb_help_offset,
				tokenlen));
			proto_item_append_text(item," [Remote Source Address Mask]");
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
			break;
		case MEGACO_GM_SPF:
			tokenlen = tvb_offset - tvb_help_offset;
			item = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen,
				"%s", tvb_format_text(tvb,tvb_help_offset,
				tokenlen));
			proto_item_append_text(item," [Remote Source Port Filtering]");
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
			break;
		case MEGACO_GM_SPR:
			tokenlen = tvb_offset - tvb_help_offset;
			item = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen,
				"%s", tvb_format_text(tvb,tvb_help_offset,
				tokenlen));
			proto_item_append_text(item," [Remote Source Port Range]");
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
			break;
		case MEGACO_GM_ESAS:
			tokenlen = tvb_offset - tvb_help_offset;
			item = proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen,
				"%s", tvb_format_text(tvb,tvb_help_offset,
				tokenlen));
			proto_item_append_text(item," [Explicit Source Address Setting]");
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);
			break;
		default:
			tokenlen = tvb_offset - tvb_help_offset;
			proto_tree_add_text(megaco_mediadescriptor_tree, tvb, tvb_help_offset, tokenlen,
				"%s", tvb_format_text(tvb,tvb_help_offset,
				tokenlen));
			tvb_current_offset = megaco_tvb_skip_wsp(tvb, tvb_offset +1);

			break;
		}
	}
}
/* Copied from MGCP dissector, prints whole message in raw text */

static void tvb_raw_text_add(tvbuff_t *tvb, proto_tree *tree){

  gint tvb_linebegin,tvb_lineend,tvb_len,linelen;

  tvb_linebegin = 0;
  tvb_len = tvb_length(tvb);

  proto_tree_add_text(tree, tvb, 0, -1,"-------------- (RAW text output) ---------------");

  do {
    linelen = tvb_find_line_end(tvb,tvb_linebegin,-1,&tvb_lineend,FALSE);
    proto_tree_add_text(tree, tvb, tvb_linebegin, linelen,
			"%s", tvb_format_text_wsp(tvb,tvb_linebegin,
					      linelen));
    tvb_linebegin = tvb_lineend;
  } while ( tvb_lineend < tvb_len );
}

/* Register all the bits needed with the filtering engine */
/* The registration hand-off routine */
void
proto_reg_handoff_megaco(void)
{
	static gboolean megaco_prefs_initialized = FALSE;
	static dissector_handle_t megaco_text_tcp_handle;
	/*
	* Variables to allow for proper deletion of dissector registration when
	* the user changes port from the gui.
	*/
	static guint txt_tcp_port;
	static guint txt_udp_port;
#if 0
	static guint bin_tcp_port;
	static guint bin_udp_port;
#endif

	if (!megaco_prefs_initialized) {
		sdp_handle = find_dissector("sdp");
		h245_handle = find_dissector("h245dg");
		h248_handle = find_dissector("h248");
		h248_otp_handle = find_dissector("h248_otp");
		data_handle = find_dissector("data");

		megaco_text_handle = find_dissector("megaco");
		megaco_text_tcp_handle = create_dissector_handle(dissect_megaco_text_tcp, proto_megaco);

		dissector_add("sctp.ppi", H248_PAYLOAD_PROTOCOL_ID,   megaco_text_handle);

		megaco_prefs_initialized = TRUE;
	}
	else {
		dissector_delete("tcp.port", txt_tcp_port, megaco_text_tcp_handle);
		dissector_delete("udp.port", txt_udp_port, megaco_text_handle);
	}

	/* Set our port number for future use */

	txt_tcp_port = global_megaco_txt_tcp_port;
	txt_udp_port = global_megaco_txt_udp_port;

	dissector_add("tcp.port", global_megaco_txt_tcp_port, megaco_text_tcp_handle);
	dissector_add("udp.port", global_megaco_txt_udp_port, megaco_text_handle);

}

void
proto_register_megaco(void)
{
	static hf_register_info hf[] = {
		{ &hf_megaco_audititem,
		{ " Audit Item", "megaco.audititem", FT_STRING, BASE_DEC, NULL, 0x0,
		"Identity of item to be audited ", HFILL }},
		{ &hf_megaco_audit_descriptor,
		{ "Audit Descriptor", "megaco.audit", FT_NONE, BASE_DEC, NULL, 0x0,
		"Audit Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_command_line,
		{ "Command line", "megaco.command_line", FT_STRING, BASE_DEC, NULL, 0x0,
		"Commands of this message ", HFILL }},
		{ &hf_megaco_command,
		{ "Command", "megaco.command", FT_STRING, BASE_DEC, NULL, 0x0,
		"Command of this message ", HFILL }},
		{ &hf_megaco_Context,
		{ "Context", "megaco.context", FT_STRING, BASE_DEC, NULL, 0x0,
		"Context ID of this massage ", HFILL }},
		{ &hf_megaco_digitmap_descriptor,
		{ "DigitMap Descriptor", "megaco.digitmap", FT_STRING, BASE_DEC, NULL, 0x0,
		"DigitMap Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_error_descriptor,
		{ "ERROR Descriptor", "megaco.error", FT_STRING, BASE_DEC, NULL, 0x0,
		"Error Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_error_Frame,
		{ "ERROR frame", "megaco.error_frame", FT_STRING, BASE_DEC, NULL, 0x0,
		"Syntax error ", HFILL }},
		{ &hf_megaco_Event_Buffer_Control,
		{ "Event Buffer Control", "megaco.eventbuffercontrol", FT_STRING, BASE_DEC, NULL, 0x0,
		"Event Buffer Control in Termination State Descriptor", HFILL }},
		{ &hf_megaco_events_descriptor,
		{ "Events Descriptor", "megaco.events", FT_STRING, BASE_DEC, NULL, 0x0,
		"Events Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_Local_descriptor,
		{ "Local Descriptor", "megaco.localdescriptor", FT_STRING, BASE_DEC, NULL, 0x0,
		"Local Descriptor in Media Descriptor ", HFILL }},
		{ &hf_megaco_LocalControl_descriptor,
		{ "Local Control Descriptor", "megaco.localcontroldescriptor", FT_STRING, BASE_DEC, NULL, 0x0,
		"Local Control Descriptor in Media Descriptor ", HFILL }},
		{ &hf_megaco_media_descriptor,
		{ "Media Descriptor", "megaco.media", FT_STRING, BASE_DEC, NULL, 0x0,
		"Media Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_modem_descriptor,
		{ "Modem Descriptor", "megaco.modem", FT_STRING, BASE_DEC, NULL, 0x0,
		"Modem Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_mode,
		{ "Mode", "megaco.mode", FT_STRING, BASE_DEC, NULL, 0x0,
		"Mode  sendonly/receiveonly/inactive/loopback", HFILL }},
		{ &hf_megaco_multiplex_descriptor,
		{ "Multiplex Descriptor", "megaco.multiplex", FT_STRING, BASE_DEC, NULL, 0x0,
		"Multiplex Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_observedevents_descriptor,
		{ "Observed Events Descriptor", "megaco.observedevents", FT_STRING, BASE_DEC, NULL, 0x0,
		"Observed Events Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_packages_descriptor,
		{ "Packages Descriptor", "megaco.packagesdescriptor", FT_STRING, BASE_DEC, NULL, 0x0,
		"Packages Descriptor", HFILL }},
		{ &hf_megaco_pkgdname,
		{ "pkgdName", "megaco.pkgdname", FT_STRING, BASE_DEC, NULL, 0x0,
		"PackageName SLASH ItemID", HFILL }},
		{ &hf_megaco_Remote_descriptor,
		{ "Remote Descriptor", "megaco.remotedescriptor", FT_STRING, BASE_DEC, NULL, 0x0,
		"Remote Descriptor in Media Descriptor ", HFILL }},
		{ &hf_megaco_reserve_group,
		{ "Reserve Group", "megaco.reservegroup", FT_STRING, BASE_DEC, NULL, 0x0,
		"Reserve Group on or off", HFILL }},
		{ &hf_megaco_h324_muxtbl_in,
		{ "h324/muxtbl_in", "megaco.h324_muxtbl_in", FT_STRING, BASE_DEC, NULL, 0x0,
		"h324/muxtbl_in", HFILL }},
		{ &hf_megaco_h324_muxtbl_out,
		{ "h324/muxtbl_out", "megaco.h324_muxtbl_out", FT_STRING, BASE_DEC, NULL, 0x0,
		"h324/muxtbl_out", HFILL }},
		{ &hf_megaco_ds_dscp,
		{ "ds/dscp", "megaco.ds_dscp", FT_STRING, BASE_DEC, NULL, 0x0,
		"ds/dscp Differentiated Services Code Point", HFILL }},
		{ &hf_megaco_h324_h223capr,
		{ "h324/h223capr", "megaco._h324_h223capr", FT_STRING, BASE_DEC, NULL, 0x0,
		"h324/h223capr", HFILL }},
		{ &hf_megaco_reserve_value,
		{ "Reserve Value", "megaco.reservevalue", FT_STRING, BASE_DEC, NULL, 0x0,
		"Reserve Value on or off", HFILL }},
		{ &hf_megaco_requestid,
		{ "RequestID", "megaco.requestid", FT_STRING, BASE_DEC, NULL, 0x0,
		"RequestID in Events or Observedevents Descriptor ", HFILL }},
		{ &hf_megaco_servicechange_descriptor,
		{ "Service Change Descriptor", "megaco.servicechange", FT_STRING, BASE_DEC, NULL, 0x0,
		"Service Change Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_Service_State,
		{ "Service State", "megaco.servicestates", FT_STRING, BASE_DEC, NULL, 0x0,
		"Service States in Termination State Descriptor", HFILL }},
		{ &hf_megaco_signal_descriptor,
		{ "Signal Descriptor", "megaco.signal", FT_STRING, BASE_DEC, NULL, 0x0,
		"Signal Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_statistics_descriptor,
		{ "Statistics Descriptor", "megaco.statistics", FT_STRING, BASE_DEC, NULL, 0x0,
		"Statistics Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_streamid,
		{ "StreamID", "megaco.streamid", FT_STRING, BASE_DEC, NULL, 0x0,
		"StreamID in the Media Descriptor ", HFILL }},
		{ &hf_megaco_termid,
		{ "Termination ID", "megaco.termid", FT_STRING, BASE_DEC, NULL, 0x0,
		"Termination ID of this Command ", HFILL }},
		{ &hf_megaco_TerminationState_descriptor,
		{ "Termination State Descriptor", "megaco.terminationstate", FT_STRING, BASE_DEC, NULL, 0x0,
		"Termination State Descriptor in Media Descriptor ", HFILL }},
		{ &hf_megaco_topology_descriptor,
		{ "Topology Descriptor", "megaco.topology", FT_STRING, BASE_DEC, NULL, 0x0,
		"Topology Descriptor of the megaco Command ", HFILL }},
		{ &hf_megaco_transaction,
		{ "Transaction", "megaco.transaction", FT_STRING, BASE_DEC, NULL, 0x0,
		"Message Originator", HFILL }},
		{ &hf_megaco_transid,
		{ "Transaction ID", "megaco.transid", FT_STRING, BASE_DEC, NULL, 0x0,
		"Transaction ID of this message", HFILL }},
		{ &hf_megaco_mId,
		{ "MediagatewayID", "megaco.mId", FT_STRING, BASE_DEC, NULL, 0x0,
		"Mediagateway ID", HFILL }},
		{ &hf_megaco_version,
		{ "Version", "megaco.version", FT_STRING, BASE_DEC, NULL, 0x0,
		"Version", HFILL }},
		{ &hf_megaco_h245,
		{ "h245", "megaco.h245", FT_STRING, BASE_DEC, NULL, 0x0,
		"Embedded H.245 message", HFILL }},
		{ &hf_megaco_h223Capability,
 		{ "h223Capability", "megaco.h245.h223Capability", FT_NONE, BASE_NONE, NULL, 0,
		"megaco.h245.H223Capability", HFILL }},

		GCP_HF_ARR_ELEMS("megaco",megaco_ctx_ids),

		/* Add more fields here */
	};
	static gint *ett[] = {
		&ett_megaco,
		&ett_megaco_message,
		&ett_megaco_message_body,
		&ett_megaco_context,
		&ett_megaco_command_line,
		&ett_megaco_descriptors,
		&ett_megaco_mediadescriptor,
		&ett_megaco_TerminationState,
		&ett_megaco_Remotedescriptor,
		&ett_megaco_Localdescriptor,
		&ett_megaco_LocalControldescriptor,
		&ett_megaco_auditdescriptor,
		&ett_megaco_eventsdescriptor,
		&ett_megaco_observedeventsdescriptor,
		&ett_megaco_observedevent,
		&ett_megaco_packagesdescriptor,
		&ett_megaco_requestedevent,
		&ett_megaco_signalsdescriptor,
		&ett_megaco_requestedsignal,
		&ett_megaco_h245,
		GCP_ETT_ARR_ELEMS(megaco_ctx_ids),
	};

	module_t *megaco_module;

	proto_megaco = proto_register_protocol("MEGACO",
					   "MEGACO", "megaco");

	register_dissector("megaco", dissect_megaco_text, proto_megaco);

	proto_register_field_array(proto_megaco, hf, array_length(hf));
	proto_register_subtree_array(ett, array_length(ett));

	/* Register our configuration options, particularly our ports */

	megaco_module = prefs_register_protocol(proto_megaco, proto_reg_handoff_megaco);

	prefs_register_uint_preference(megaco_module, "tcp.txt_port",
		"MEGACO Text TCP Port",
		"Set the TCP port for MEGACO text messages",
		10, &global_megaco_txt_tcp_port);

	prefs_register_uint_preference(megaco_module, "udp.txt_port",
		"MEGACO Text UDP Port",
		"Set the UDP port for MEGACO text messages",
		10, &global_megaco_txt_udp_port);

#if 0
	prefs_register_uint_preference(megaco_module, "tcp.bin_port",
		"MEGACO Binary TCP Port",
		"Set the TCP port for MEGACO binary messages",
		10, &global_megaco_bin_tcp_port);

	prefs_register_uint_preference(megaco_module, "udp.bin_port",
		"MEGACO Binary UDP Port",
		"Set the UDP port for MEGACO binary messages",
		10, &global_megaco_bin_udp_port);
#endif

	prefs_register_bool_preference(megaco_module, "display_raw_text",
		"Display raw text for MEGACO message",
		"Specifies that the raw text of the "
		"MEGACO message should be displayed "
		"instead of (or in addition to) the "
		"dissection tree",
		&global_megaco_raw_text);

	prefs_register_bool_preference(megaco_module, "display_dissect_tree",
		"Display tree dissection for MEGACO message",
		"Specifies that the dissection tree of the "
		"MEGACO message should be displayed "
		"instead of (or in addition to) the "
		"raw text",
		&global_megaco_dissect_tree);
	prefs_register_bool_preference(megaco_module, "ctx_info",
		"Track Context",
		"Mantain relationships between transactions and contexts "
		"and display an extra tree showing context data",
		&keep_persistent_data);

	megaco_tap = register_tap("megaco");

}


/*
* megaco_tvb_skip_wsp - Returns the position in tvb of the first non-whitespace
*		 character following offset or offset + maxlength -1 whichever
*		 is smaller.
*
* Parameters:
* tvb - The tvbuff in which we are skipping whitespaces, tab and end_of_line characters.
* offset - The offset in tvb from which we begin trying to skip whitespace.
*
* Returns: The position in tvb of the first non-whitespace
*/
static gint megaco_tvb_skip_wsp(tvbuff_t* tvb, gint offset ){
	gint counter = offset;
	gint end,tvb_len;
	guint8 tempchar;
	tvb_len = tvb_length(tvb);
	end = tvb_len;

	for(counter = offset; counter < end &&
		((tempchar = tvb_get_guint8(tvb,counter)) == ' ' ||
		tempchar == '\t' || tempchar == '\n' || tempchar == '\r'); counter++);
	return (counter);
}
static gint megaco_tvb_skip_wsp_return(tvbuff_t* tvb, gint offset){
	gint counter = offset;
	gint end;
	guint8 tempchar;
	end = 0;

	for(counter = offset; counter > end &&
		((tempchar = tvb_get_guint8(tvb,counter)) == ' ' ||
		tempchar == '\t' || tempchar == '\n' || tempchar == '\r'); counter--);
	counter++;
	return (counter);
}
